precautions and warnings - abcenser.com.tr · n harsvert-a series variable frequency drive is lived...

Precautions and warnings

n HARSVERT-A Series variable frequency drive is lived with 3kv, 6kv, 10kv voltage when working.

Operators must go through systematic training, read and comprehend the “User’s Manual” before the

equipment is installed and put into use. In addition, operators shall strictly follow the operation instruction.

Any losses or injuries arisen from improper operation shall be borne by the user himself.

n Beijing Leader & Harvest Electric Technologies Co., Ltd. reserves the right to give explanation to this

manual. Any technical or engineering question the user may have during the course of operation will be

responded by contacting us.

Add:South Zone Yangfang Industrial Park,ChangPing District,Beijing 102205,P.R.China

Tel: (8610)69764466 69764862

Fax : (8610)69764853

http://www.ld-harvest.com

n This manual is provided along with the delivery of the equipment. It is not allowed to disclose any

contents in terms of this manual in any ways without approval. Beijing Leader & Harvest Electric

Technologies Co., Ltd reserves the right to upgrade relevant technology with respect to the equipment. Any

change if any, concerning this manual would not be advised separately.

http://www.ld-harvest.com

IGBT SINEWAV Leader & Harvest medium voltage VFD system

2

Content Chap 1 Introduction............................................................................................................................................. 5

1.1 Characteristics of medium voltage variable frequency drive (VFD)..................................................... 5

1.2 Possible application............................................................................................................................... 7

1.3 Following standard................................................................................................................................ 8

1.4 VFD model number definition .............................................................................................................. 9

1.5 Technical parameters of VFD.............................................................................................................. 10

1.6 VFD model-selection guide................................................................................................................. 12

Chap 2 System Principle ................................................................................................................................ 13

2.1 System principle.................................................................................................................................. 13

2.2 Structure of VFD system..................................................................................................................... 16

2.2.1 Input side structure ................................................................................................................... 16

2.2.2 Power cell structure .................................................................................................................. 16

2.2.3 Output Side Structure ............................................................................................................... 17

2.2.4 Controller ................................................................................................................................. 17

Chap 3 Operation of the controller cabinet .................................................................................................... 19

Chap 4 PC interface........................................................................................................................................ 22

4.1 The software interface ......................................................................................................................... 22

4.2 System function set-up ........................................................................................................................ 26

4.2.1 select the dispatching mode...................................................................................................... 26

4.2.2 start mode selection .................................................................................................................. 27

4.2.3 Operation mode set-up ............................................................................................................. 27

4.2.4 Frequency given mode ............................................................................................................. 28

4.2.5 Upper PC control...................................................................................................................... 28

4.2.6 System by-pass circuit setting .................................................................................................. 28

4.2.7 cabinet gates interlock .............................................................................................................. 29

4.2.8 valve linked .............................................................................................................................. 29

4.3 Parameter button ................................................................................................................................. 30

4.3.1 Speed set-up ............................................................................................................................. 32

4.3.2 Control parameter..................................................................................................................... 36

4.3.3 Debugging parameter ............................................................................................................... 38

4.3.4 Motor parameter ....................................................................................................................... 40

4.3.5 Super setting............................................................................................................................. 41

4.3.6 Auto measurement.................................................................................................................... 51

4.4 Wave button......................................................................................................................................... 55

4.5 Operation data record .......................................................................................................................... 58


3

4.6 Inquire Fault information .................................................................................................................... 59

4.6.1 Fault inquisition window.......................................................................................................... 59

4.6.2 Fault information procession.................................................................................................... 59

4.7 SetTool Of The High-Voltage Inverter System ................................................................................... 60

4.7.1 Login, user management and data authority management ....................................................... 60

4.7.2 Configuration of basic parameters of the control system ......................................................... 63

4.7.3 Function lock set-up ................................................................................................................. 64

4.7.4 Sampling scaler ........................................................................................................................ 64

4.7.5 PID Regulation...................................................................................................................... 65

4.7.6 System function set-up ............................................................................................................. 68

4.7.7 Segmented speed regulation..................................................................................................... 69

4.7.8 Communication port configuration .......................................................................................... 70

4.7.9 Define the object controlled ..................................................................................................... 70

4.7.10 Addition, deletion and modification of field analogue input .................................................. 71

4.7.11 Configuration of analogue output........................................................................................... 73

4.7.12 PLC IO ................................................................................................................................... 74

4.7.13 Standard parameter configuration .......................................................................................... 74

4.7.14 Standard parameter menu configuration................................................................................. 75

4.7.15 Parameter extension of PLC................................................................................................... 76

4.7.16 Definition and display of field analogue input ....................................................................... 77

4.7.17 Addition, deletion, definition and display of field digital node.............................................. 78

4.8 The operation mode of medium voltage VFD system......................................................................... 80

4.8.1 Open loop ................................................................................................................................. 80

4.8.2 Close loop................................................................................................................................. 80

4.8.3 Soft-start ................................................................................................................................... 80

4.8.4 Normal stop .............................................................................................................................. 80

4.8.5 Emergency stop ........................................................................................................................ 80

4.9 Safe & fast operate steps ..................................................................................................................... 82

4.9.1 Local control, computer preset, open-loop operation:.............................................................. 82

4.9.2 Remote control, analogue preset, open-loop operation ............................................................ 82

4.9.3 Local control, computer preset, close loop operation............................................................... 83

4.9.4 Remote control, analogue preset, close loop operation ............................................................ 83

4.9.5 Local control, analogue preset, open-loop operation................................................................ 84

4.9.6 Remote control, computer preset, open-loop operation............................................................ 84

4.9.7 Local control, analogue preset, close loop operation ............................................................... 84

4.9.8 Remote control, computer preset, close loop operation ........................................................... 85


4

4.9.9 Local control, soft-start operation ............................................................................................ 85

4.9.10 Remote control, soft-start operation ....................................................................................... 86

4.10 Caution ........................................................................................................................................... 87

4.11 The maintenance of VFD .................................................................................................................. 88

Chap 5 Frequently Asked and Questions .......................................................................................................... 89

5.1 Light fault’ classifications and alarm .................................................................................................. 89

5.2 Serious faults’ classifications and corresponding alarm...................................................................... 90

5.3 Dispositions of FAQ............................................................................................................................ 91

5.3.1 Power unit over-voltage ........................................................................................................... 91

5.3.2 Power unit low-voltage ............................................................................................................ 91

5.3.3 Power unit over-current............................................................................................................ 91

5.3.4 Power unit overheat.................................................................................................................. 91

5.3.5 Power unit phase-lack .............................................................................................................. 91

5.3.6 Power unit fiber communication fault ...................................................................................... 91

5.3.7 controllers not ready................................................................................................................. 92

5.3.8 Bypass operation alarm ............................................................................................................ 92

5.3.9 Cabinet’s interlock alarm ......................................................................................................... 92

5.3.10 Power unit cabinet fan fault.................................................................................................... 92

5.3.11 Transformer slight overheat ................................................................................................... 92

5.3.12 Field alarm input valid ........................................................................................................... 93

5.3.13 Transformer serious overheat ................................................................................................. 93

5.3.12 Field brake-sever input valid .................................................................................................. 93

5.3.13 The power off alarm of the UPS input ................................................................................... 93

5.3.14 No audible alarm when fault occurs ....................................................................................... 93

5.3.15 Alarm without interface indications ....................................................................................... 93

5.3.16 The PLC has no response ....................................................................................................... 94

5.3.17 disposition after the down fault of standard operation panel and industrial computers ......... 94

5.3.18 Inverter start fault ................................................................................................................... 94

5.3.19 the operation frequency can’t be modified ............................................................................. 95

5.4 How to replace a faulty power unit ..................................................................................................... 96

Chap 6 Transport and Storage ........................................................................................................................... 97

6.1 Transport and storage .......................................................................................................................... 97

6.1.1 Transport .................................................................................................................................. 97

6.1.2 storage ...................................................................................................................................... 97


5

Chap 1 Introduction 1.1 Characteristics of medium voltage variable frequency drive (VFD)

HARSVERT series medium voltage variable frequency drive is designed to be highly reliable with

outstanding performance, yet easy to use. It can satisfy users’ need for changing the speed of fans or pumps to

improve production technology and save energy. The system is compatible with all types of universal

three-phase asynchronous motors and ordinary medium voltage synchronous motor(including excitation

system). HARSVERT series VFD manfacturered with new type of IGBT with digital microprocessor control

achieves to control more exactly, applying to situation where needs high precision for speed adjusting. It has

characteristics as follows:

1.1.1High-High voltage resource VFD, direct input medium voltage, direct output medium voltage, no output

transformer required.

● Output voltage , including 3kV, 3.3kV, 6kV, 6.6kV, 10kV, 11kV, adopts electric net-work of areas (China,

Russia, East-south of Asia, etc).

● High flexibility of input voltage

● The fluctuating range of electric net-work for HARSVERT series VFD is ±10%. When electric net-work

voltage drops within -35%, VFD derates to operate.

● Modular design of the power circuit, simplifies maintenance routine; high reliability of system.

● Power cell manufactured with IGBT is high in redundance; technique of self-bypass of power cell; system

reconstructs voltage vector when failure power cell quits to operate, ehancing utilization of voltage;

ensure 96% of output voltage when single power cell is broken in 8 level seriers.

● Start up again after power failure recovery: when power faults and recovers within set time (default

setting: 20s), VFD will self-start up. System searches motor speed automatically to achieve to start again

without impact, recovering original operation state.

● The complete fault monitor circuit, accurate fault alarm.(set protection function with classes, achieving

consecutive operation furthest.)

● Medium voltage main circuit is connected to controller through optical fibre, safe and reliable.

● Built-in cooling fans; redundancy design for cooling system.

● Redundancy design for control power source ( built-in UPS).

● User popedom management.

● Special design for high reliability required of different users.

● Starts up again during rotating.

● Efficiency is higher than conventional adjustable-speed drive.

● Soft start up function, no electric net-work drop resulted from impact of motor start, ensure safe and long

operation of motor.

● Decrease motor wear; save maintaince cost; evident energy-saving benefit; excellent performance/price


6

ratio.

● Fans and pumps reduce speed of motor to adjust output through HARSVERT series VFD, which not only

achieves to save energy but also decreases wear of motor and load, save cost for users.

1.1.2 Advanced and mature technique of controlling

● Advanced technique of PWM modulation.

1.1.3 High quality of power input and power output

● High input power factor, low harmonic current, no power factor compensator or harmonic control device

required.

● HARSVERT series VFD adopts mulriple commutation technology on power source side, low harmonic

pollution and high power factor, which are up to standard of GB 14549-93 and IEEE std 519-1992.

● Sinusoidal step PWM output wave, low harmonic

● No output filter required, can be directly connected to common motor, no harm to the insulation of cable

or motor, low harmonics, reduction of vibration of bearing and fin of motor, the outlet line can be as long

as 1000m.

1.1.4 Friendly and brief interface

● Friendly operation interface, flexible extended port

● ECON operation panel or colour LCD touchscreen with WINDOWS interface.

● Powerful interface has functions of failure display, inquire, record, parameter set, self-detection, etc.

1.1.5 Multiform communication port

● VFD is abundant in analog and digital I/O port, intergrated PLC, can be connected to various automatic

equipment and system, which meets different requirments of various locale; Offer field control, remote

control in monitor station and GPRS wireless remote control; Able to operate at either open-loop control

or close-loop control status with the built-in PID regulator.

● Support various communication protocols such as Profibus, Modbus, TCP/ IP and Device net, etc.

1.1.6 Perfect and simple parameter setup

● Perfect parameter setup function for universal VFD (frequency fixed, operation mode setup, control mode

and self-attemper, etc)

● Easy installation, system parameter setup and system adjustment.


7

1.2 Possible application HARSVERT series medium-voltage VFD are universally applied to fans and pumps:

Power industry: ID fan, air blower, dust collection fan, compressor, feed pump, slurry pump, etc.

Metallurgy: ID fan, dust collection fan, blower, slurry pump, dusting pump,etc.

Petroleum chemical industry: main pipe-line pumps, water inject pump, feed pump, water

circulation pump, petroleum submersible pump, ID fan, air compressor, brine pump, mixer,

compressing machine, etc.

Water: water pump

Sewage disposal: sewage pump, fresh water pump, clean up pump, raw-water pump, etc.

Cement manufacture: ID fan, air blower, dust collection fan, blower, etc.

Paper making: beaters

Pharmacy: clean up pumps

Mining: water delivery pump, fan, medium pump, etc.

Others: drives, wind trubines, wind tunnel test, air compressor, etc.

In metallurgy, mineral, chemical industry, transportation, agriculture, national defense, national

economical or living realm, particularly in large power blowers, water pumps, conventional shield plate and

throttle are replaced by HARSVERT series VFD to control speed, which achieves evident energy-saving.

Under certain circumstances, users’ technological need is the reason for changing speed of fans and

pumps. HARSVERT series medium-voltage VFD series have remarkably high control accuracy, which can

completely satisfy the technological requirements while, in addition, save vast energy.


8

1.3 Following standard HARSVERT VFD series satisfy the standards below as well as related clauses of these standards. All

standards are valid at the point of sales.

IEC 61800-4：2002 Adjustable speed electrical power drive systems - Part 4: General

requirements; Rating specifications for a.c. power drive systems above 1

000 V a.c. and not exceeding 35 kV

IEC 196：1965 Standard frequencies

IEC 68-2-6：1982 Environmental testing for electric and electronic products—Part 2: Test

methods—Test Fc and guidance: Vibration (Sinusoidal)

IEC 50-551：1982 Electro technical terminology—Power electronics

IEC 146-1-2：1991 Semiconductor converters—Specification of basic requirements

IEC 146-1-2：1991 Semiconductor converters—Application guide

IEC 1-3：1991 Semiconductor converters—Transformers and reactors

IEC 529-：1989 Degrees of protection provided by encolsure (IP code)

IEC/PQC89：1990 Sectional specification: single and double-side printed boards with plain holes

IEC/PQC89：1990 Sectional specification: single and double-side printed boards with

plated-through holes

IEC 61800-2：1998 Variable speed electrical power driving system Part 2: Universal requirements

–Rating specifications for low voltage variable frequency system

IEEE Std 519-1992 Recommended practices and requirements for harmonic control in electrical

power system


9

1.4 VFD model number definition Model number designations of the medium-voltage VFD is as follows:

□□□ □ □□□□ －□□ □□□／ □□□

Rated current (A)

Voltage class (kV)

Control mode

VFD

Sinusoidal wave

Company name abbreviation

Note:

1 Rated current is □□□A.

2 Voltage class (output voltage) : 03－3kV; 03.3－3.3kV; 06－6kV; 06.6－6.6kV; 10－10kV;

11－11kV.

3 control mode: A- asynchronous electrical motor; S-synchrodyne; VA: asynchronous motor vector control;

VS: synchrodyne vector control.

For example:

ＨＡＲＳＶＥＲＴ－Ａ０６／１３０

Rated current 130A

Voltage class 6kV

Asynchronous motor

VFD

Sinusoidal wave

Company name abbreviatio

Note: For convenient, VFD in this manual means medium-voltage variable frequency drive, no extra

explanation appears in other chapters.

IGBT SINEWAV Lead & Harvest medium voltage VFD system

10

1.5 Technical parameters of VFD

Technical parameters of HARSVERT VFD series are shown on table 1.1.

Item Parameter Remark Standard Q/CP BLH003-2007

Input Phase, frequency Three phase, 50/60Hz

Allowable frequency fluctuation range

±10%

Allowable voltage fluctuating range

Fluctuating range: ±10%； Derating operating when voltage drops -35%; ride

throuth for 5 cycles loss of powe supply

Power factor >0.95 (above 20% load) Output

Output voltage range 3kV--11kV

Output current range 25A--600A

Power range 280kW--5600kW

Output voltage, current, and power need to be designed synthetically, welcome to inquiry for higher voltage or power by telephone.

Over-load capacity 120% of rated current for 1min per 10minutes; 150%

of rated current for 3s; 200% immediately

Frequency 0.5--120Hz Can be setup according to motor

Basic performance Efficiency ≥96% (including transformer)

Harmonics Up to standard of GB 14549-93 and IEEE 519-1992

requirement of power quality standard

Frequency resolution 0.01Hz Control

Control mode V/F control, Sensorless Vector Control Acceleration/decelera

tion time 0～3200s, adjustable

I/O port and communication function

Enough I/O port, RS485, Modbus-RTU, Profibus-DP, TCP/IP, DeviceNet and GPRS wireless transporation can be expanded acorrding to users’requirement

Control signal transportation

By optical fibre Between main circuit and controller


11

Item Parameter Remark

Control voltage AC380V, three-phase four-wire system,

AC220V/DC220V Capacity: 3kVA

PID function Built-in PID regulator, parameter can be set up

Control function

Startup again after transient power down, torque winding, overleap of critical velocity, self-detection,

function of system bypass and power cell bypass, protection of VFD and motor.

Operation Operation mode Local/remote, open loop/closed loop Frequency given Manual operation/analogue given

VFD output Output of analogue and digital Can be expanded according to users’need

Display Integrative

man-machine interface eCon operation panel

Output frequency, voltage, current, power; input voltage, current, power, power factor; failure/alarm and its record; parameter setup; waveform display, etc.

Make a choice in them

Ambience

Work field Inside room, altitude: below 1000m, no caustic and volatile air, no dust

Temperature/humidity Temperature: 0--+40oC; Humidity: below 90%, no

condensation Storage condition -25～+55℃

Please inquiry Leader & Harvest for the special

others

Protection Over current, short circuit, ground, over voltage, low voltage, over load, over heat, over load of motor,

lack-phase, power cell failure, etc.

Enclose IP30--IP41

Cooling method air cooling/air conditioner/air-water cooling Selection according to work field

form1.1 HARSVERT VFD series parameters


12

1.6 VFD model-selection guide 1.6.1 Groupware and configuration

Configuration of HARSVERT VFD series is shown in fig1.1.

Harvest Harvest

transformer cabinet power cell cabinet controller cabinet

frontal view

Fig 1.1 outline of HARSVERT VFD series

Groupwares:

Transformer cabinet: built-in shifting phase rectifier transformer supplies power for each power cell on the input side.

Power cell cabinet: built-in powercells in modular design, inverting main circuit of cascade-connecting supplies adjustable voltage to motor.

Controller cabinet: built-in control components control VFD operation and dispose data collected, has man-machine interface, various data communication ports and control system ports of field.

Bypass cabinet (optional): it switches motor to electirc network of line frequency, starts bypass function, can be chosen to use according to users’ need.


13

Chap 2 System Principle 2.1 System principle

Structure of HARSVERT VFD series is shown in fig 2.1. The system is composed of phase shifting transformer, power cells and controller(embeded bypass cabinet according to users’ need). 3kV and 3.3kV series have 12 power cells, and every 4 make up a phase in series. 6kV series has 15 (or 18, 24) power cells, every 5 (or 6, 8) make up a phase in series. 6.6kV series has 18 power cells, every 6 make up a phase in series. 10kV series has 24 power cells, and every 8 make up a phase in series. 11kV series has 27 power cells, every 9 make up a phase in series. The structures of 3kV, 6kV, 6.6kV, 10kV and 11kV series VFD are shown in fig 2.1 (a), (b), (c), (d)and (e).

kV Hz

kVasynchronous motor

transformer

controller

indu

stry

fiel

d

man-machine interface

anal

ogue

Fig (a)

man-macnine interface

controller

indu

stry

field

transformer


14

Fig (b)

transformer

asynchronous motor

indu

stry

fiel

d

controller


Fig (c)

M

asynchronous motor10kV

controller


anal

ogue

transformerin

dust

ry fi

eld

Fig (d)


15

kV Hz

transformer

11kV asynchronous motor

controller


anal

ogue

indu

stry

fiel

d

Fig (e)

Fig 2.1 the structure of VFD system


16

2.2 Structure of VFD system Technique of cascade-connected power cells solve problem of components anti-voltage.

Phase shifting and additivity of multi-level series PWM singals decrease output harmonic and dv/dt of output voltage; decrease haromoic influence to electric network through additivity of multi current; besides digital signal processor and programmable logic device (CPLD and FPGA) as center of main controller, data-collecting unit, unit controller, optical communication circuit and programmable logic controller (PLC) make up of control system. 2.2.1 Input side structure

Phase-shifting transformer supplies power to each power cell on the input side. The transformer’s secondary winding is divided into three groups; normally, 24-pulse, 30-pulse, 36-pulse, 48-pulse, 54-pulse series constitute rectify mode of multi-pulse overlap, which greatly improves the line current wave quality, and the load power factor can be improved up to near 1.

In addition, the independence of transformer’s secondary winding makes the main circuit of power cell separated relatively. It’s similar to the normal low-voltage inverter, therefore, easy to utilize mature technology. 2.2.2 Power cell structure

Each power cell is completely identical in structure, and can be replaced with others. The circuit structure is shown in fig 2.3, it is a basic single phase AC-DC-AC inverting circuit. The rectifier is a three-phase diode bridge. By controlling the IGBT inverter in sin wave PWM, the output voltage waveform is shown in fig 2.4.

R

ST

fu se

re ct ifie r

a bso rp t ion c a pa c ito r d iv ide r re s is ta n ce inv e rte r

b yp a ss ci rcu it

fig 2.3 circuit structure of power cell


17

T

1 >

1) Ref A: 200 Volt 5 ms Fig 2.4 output PWM waveform

2.2.3 Output Side Structure

See fig2.1. At the output side, U and V output terminal of each power cell are connected in series to form a star connection to supply power for motor. By restructuring PWM waveform of each cell, we can get the step PWM waveform shown in fig 2.5. It has a good sine-shape, small dv/dt, which decreases destruction to cable and motor insulation. Achieves long output cable without output filter, no motor degraded, and can be applied for motor directly. Meanwhile motor harmonic is reduced greatly, which reduces mechanical vibration and mechanical stress of bearing and blade.

When a certain power cell is broken, by conducting bypass circuit in fig2.3, the fault cell can be bypassed out without influence on other cells and VFD can run in sustained degraded mode; so loss of motor’s shutting down can be avoided in many situations.

T

1 >

1) Ref A: 200 Volt 5 ms

Fig 2.5 PWM step waveform of output phase voltage of VFD

2.2.4 Controller The core of VFD controller is high speed SCM. The well-designed algorithm ensures that the

motor is operating with the optimum performance. The controller contains an embedded PLC which deals with the logic of switching signals in cabinet and cooperates various operation and state signals. It ensures the flexibility of the system.

The controller adopts a standard VME box structure. Surface welding technology and large-scale integrate circuit such as FPGA and CPLD are used in each control board, which makes the system extremely reliable.


18

Furthermore, controller communicates with power cells through optical fibers. So medium voltage part and low voltage part are reliably isolated, which makes system extremely safe and away from electromagnetic disturbance.


19

Chap 3 Operation of the controller cabinet

fig 3.1 part of the controller cabinet

⑴ Emergency stop Under any circumstances, the local “emergency stop” button and the “emergency stop”

button on the PC interface are all valid simultaneously. When the system receives the emergency stop command or encounters serious fault, the PWM output of the power cells will be immediately inhibited, and the motor and the load will stop according to their own inertia.

Besides inhibiting the PWM pulses, the local “emergency stop” button can also disconnect the VFD from medium voltage power line. If the local “emergency stop” button is in effect, the system will stop to give the medium voltage “close-switch permission” signal. Remote “emergency stop” button and the “emergency stop” button on the industrial PC interface do not have such function.

⑵ The remote/local control mode of the medium voltage VFD system

The medium voltage VFD system has two different control modes: local control and remote control. The desired control mode is selected through “remote/local” switch. The selected control mode only affects the effectiveness of the operation command, with no effect to the mode of frequency given mode of the VFD. The mode of frequency given of the VFD could be set in the industrial PC interface. ① Remote control mode

When “remote/local” is switched to the “remote” mode, user can control the VFD from the control platform of the industrial field or from the remote computer in the centralized-control room. While the VFD is in “remote” mode, remote “start”, remote “stop” and remote “soft-start” commands become valid. The corresponding software control buttons in the main interface of the VFD interface are faded to be invalid and become ineffective. After the remote operators get the


20

“ready state signal”, remote “start” or “soft-start” button can be used to start the VFD, also remote “stop” button can be used to stop the VFD.

While the VFD is in “remote” mode, upper PC control permission must be selected in the function set-up interface of the VFD to enable the control through the remote monitor computer in the industrial field or the centralized-control room Caution: the external analogue preset signal is not always valid in the remote control. To validate external analogue preset, analogue preset mode must be selected in the function set-up interface of the industrial PC. ② Local control mode

When “remote/local” switch is selected to be “local”, the “start” button, “stop” button, “soft-start” button in the remote control platform become invalid, and the control functions of the remote monitor computer also becomes invalid simultaneously. Instead, the software control buttons in the main interface of medium voltage VFD become valid, and users can use the main interface of the VFD to operate directly. After receiving the “ready state”, operators can use the “start” button in the interface to start the VFD. When the VFD is operating in the local control mode, users can also use the “stop” or “emergency stop” in the interface to stop the VFD.

Caution: Setting the frequency in the interface and by the external analogue signal are both acceptable in local control mode, they are selected in the function set-up interface of the industrial PC.

The supervising function of remote monitor computer is still valid in local control mode. Whatever mode the “remote/local” switch is in, remote “Emergency stop” button, local

“Emergency stop” button, and the “Emergency stop” button in the interface of industrial PC are all valid simultaneously.

⑶system reset

When the VFD is running, “system reset” button is invalid. Under other conditions, the “system reset” button on the cabinet door can send reset command to the industrial PC and the controller. If serious fault occurred and trigger the VFD to stop output, user must press “system reset” button on the cabinet or the “reset” button on the industrial PC interface to reset the system and clear the fault state after the fault has been repaired or eliminated itself. Once the PLC sends out the “medium voltage permission” and the “ready” command, the VFD can be restarted.

If the audio alarm system has been cancelled by the “alarm ” command, the “system reset” command can reactivate it. However, if any faults still exist, alarm will be triggered again.

The “system reset” button on the cabinet a higher level of authority can reset the industrial PC and the controller completely, and solve serious system faults such as no response of the industrial PC or no response of the controller. The “system reset” button on the cabinet sends reset commands to the industrial PC and the controller to make them restart. After the “system reset” command is sent, the VFD must wait for the industrial PC and the controller to complete self-inspections and then goes into ready state. If the VFD system switches off due to serious faults other than no response, user is recommended to use the “reset” button on the industrial PC interface instead of the “system reset” button on the cabinet. ⑷Alarm cancellation


21

When the VFD has faults, the audio alarm system will be triggered. User can press “alarm cancellation” button to turn the alarm off. If the alarm system is triggered by slight fault during system operation, the VFD will continue running without the alarm signal once the “alarm cancellation” command is received. If another slight fault occurs at this time and the alarm is triggered again, user can repeat the above process. If the fault is repaired or disappear itself, and then occurs again, it will trigger the alarm system again and user can use the “alarm cancellation” button to cancel.

⑸The PC interface

There are more details about PC interface in：chap4 PC interface .


22

Chap 4 PC interface 4.1 The software interface

Fig 4.1 main interface of the medium voltage VFD system

The main interface of the medium voltage VFD is shown in fig. 4.1. Users can accomplish function set-up, parameter set-up, real time waveform display, operation record printing, and fault inquiry through the main interface. Under local control mode, users can start VFD directly, set operation frequency, stop, emergency stop and reset the VFD through main interface. Functions of the buttons are introduced as follows:

Increase given frequency with this button, avoid two ranges of skip frequency, set

the maximum frequency of the skip range as the given frequency when the setting frequency falls into the skip range, verify the maximum and minimum of frequency at the same time. It increases the preset value under close loop mode, and becomes inactive under analogue frequency set-up mode.

Decrease given frequency with this button, avoid two ranges of skip frequency, set the minimum frequency of the skip range as the given frequency when the setting frequency falls into the skip range, verify the maximum and minimum of frequency at the same time. It decreases the preset value under close loop mode, and becomes inactive under analogue frequency set-up mode.

Send start command to VFD. It automatically switches to “soft start” when the start-mode function is set to “soft start”. This button is inactive when remote/local control switch is set to the remote control mode. When VFD is in operation, the button’s color would become


23

grey to indicate its invalidation state. It can be used to restart VFD when VFD is decelerating to stop or in ready mode.

Send emergency stop command to VFD. This button is inactive when Remote/Local control switch sets to the Remote control mode. After users send emergency stop command, VFD immediately stops output under local control mode, and motor decelerates and stops according to its own inertia. This button turns grey to indicate its invalidation state when VFD is in ready mode.

Send stop command to VFD. This button is inactive when remote control/local

control switch sets to remote control mode. After users send stop command, VFD will decelerate to stop according to pre-set deceleration time. During deceleration period, users can restart VFD from current speed by the start button at any time. The Stop button turns grey to indicate its invalidation state when VFD is in ready mode or in stop mode.

Reset VFD to the power-on initialization state. When fault occurs, users can reset VFD after the system had been repaired, otherwise VFD will not respond the operate command. This reset button is different from the reset button on cabinet. It will not restart the industrial PC.

Users can exit monitor procedure with this button. When VFD is in operation, it will not affect the proper function of VFD. However, the operating state of the VFD will be out of monitor. Therefore, we recommend users not to exit monitor procedure when VFD is still in operation.

This button is about the function setting of the VFD. When VFD is in operation, users can inquire function set-up of VFD with this button, but cannot modify function set-up.

Input parameters of VFD and motor. Parameters can be inquired and modified in operation mode.

Inquiry current state and past fault record of VFD.


24

Inquiry input and output waveform of VFD.

Display operation record, with options of data storage on floppy disk or print data.

Settool of HARSVERT-A VFD system

Input given frequency to VFD and avoid the skip frequency, the maximum and minimum frequency limits are checked. This button is inactive when analog input is selected. This button’s function becomes to controlled value preset under close loop mode. When VFD is in soft start mode, the button is inactive and displays “switch to line frequency”.

Other than the buttons introduced above, the main interface of the VFD system displays eight main operation parameters at real time as well, which are introduced as follows: ● Setting frequency:

It displays setting frequency of VFD, which can be set by soft keyboard out by pressing setting frequency button or by acceleration button and deceleration button. It can also be set by analogue signals. When VFD is in close loop mode, it displays setting value of the controlled parameter. And when setting the VFD function to soft start, it displays the Switch to Line frequency. ● Output frequency

Display current output frequency of VFD. Under open loop mode, output frequency may temporarily differ from setting frequency during acceleration or deceleration. However, output frequency will match setting frequency after VFD’s stabilization. VFD will automatically regulate output frequency whenever necessary under close loop mode. ● Motor Speed

Displays the calculated speed of motor according to the output frequency and load. Synchronous speed is in proportion with the stator frequency of the motor, and slip speed is basically in proportion with load current of the motor. The motor rotate speed is calculated as follows:

)1()1(1200 sns

pfn −=−

×=

Where n is the motor speed, n0 is the synchronous speed, p is number of poles, and f is the

current operation frequency and s is the slip speed.


25

● Parameter under control Displays real value of controlled parameter selected by the user, such as pressure, flux,

temperature, etc. ● Input current

Displays RMS value of input line current of VFD, with the unit of Ampere. ●Output current

Displays value of output line current of VFD. ● Input voltage

Displays RMS value of input line voltage of VFD with the unit of KV. ● Output voltage

Displays RMS value of input line voltage of VFD. ● System ready

State tag of VFD displays current state of the VFD, such as ready, running, cell by-pass operation, fault, etc. The fault message is directly displayed here when the fault is not so serious, The serious fault must be inquiried in the fault window. ● Current state of function set-up

Display current control mode, operation mode and preset mode of the VFD in the main interface. If the user changes the function configuration, the displays would be changed accordingly. ● User data

Displays user value of analogue input of PLC. For example, user setting value is 0.15MPa and the feedback value is 3.44MPa.


26

4.2 System function set-up

System function set-up is active only when the VFD is stopped, and the interface is showed in figure. 4.2. 4.2.1 select the dispatching mode

Select the dispatching mode of the VFD. ● Manual dispatching

Operation mode (open/close loop) and given frequency are set manually for a certain future time period, and the automatic schedule of the VFD is inactive. ● schedule dispatching

User can fill the schedule list (click “write schedule list” button showed in fig. 4.2 to pop out schedule list) with the schedule data for a certain future time period. The given value will be automatically set by the VFD according to the schedule list, and therefore eliminates the need for manual control.

Fig. 4.2 dialog box of function set-up selection


27

Fig 4.3. automatic dispatching list

4.2.2 start mode selection Select start mode of the VFD. ● Normal start

VFD starts normally. Normal start mode must be selected in order to operate according to preset frequency under open loop or run on the expected controlled value under close loop. ● Soft start

After user starts VFD, VFD accelerates to the ‘switch to line’ frequency .When VFD output frequency reaches the ‘switch to line’ frequency, the VFD output is shut off, a ‘switch to line’ command is sent . This command could be used in the user electric control circuit to switch the motor from VFD to the power line.

After user selects soft start, operation mode set-up, preset mode set-up and analogue preset selection are all inactive.

4.2.3 Operation mode set-up

Select open or close operation mode. This is effective only under normal start mode and inactive when soft start selected. ● Close loop mode

If close loop operation mode is chosen, the VFD will operate in close loop mode after VFD starts. Under the close loop operation mode, user can increase or decrease preset value of the controlled parameter by acceleration and deceleration button on the main interface, or user can set the expectation value of controlled parameter (for example pressure, temperature ...etc.). VFD will regulate its output frequency automatically to control the speed of the motor, and force the actual value of the controlled parameter same as the expectation value by PID regulation. ● Open loop mode

If open loop operation mode is selected, the VFD will operate under the open loop mode after starting the VFD. The operation frequency of the VFD is given directly by the main interface or external analogue signal. After VFD stops and restarts again, if user do not change the operation mode setting, the VFD will


28

sustain the last set operation mode automatically. 4.2.4 Frequency given mode

Select the frequency preset method. User must select one option from the two choices. ● Given by computer

Set frequency by the acceleration or deceleration button on the main interface or by the ‘Frequency Preset’ button. ● Analogue Given

Accept 0～10V or 4～20mA external analogue signal and using ADC to calculate the preset frequency.

By selecting analogue preset, analogue preset signal selection in the function configuration interface becomes active and user can then specify the properties of the signal (voltage source or current source).

4.2.5 Upper PC control

When remote control/ local control switch on the control cabinet is switched to the remote control location, the HARSVERT-A series VFD can be started, stopped, emergency stopped, resetted, or set-up frequency by the upper PC. To make this function valid, select "permitted". Select "forbidden" to disable the upper PC from start, stop, emergency stop, reset or preset operation frequency.

If the "remote/ local control" switch turned to the local control location, whether "allow" or "forbid" is selected here, the upper PC control functions are invalid.

4.2.6 System by-pass circuit setting

There is a system by-pass function in the VFD. When serious fault occurs, the by-pass circuit control signal will use the medium voltage switches to connect the motor directly to the line. And the VFD will automatically trip off. The medium voltage switches that by-pass circuit needed could be configurated by the user, the VFD provides the control signal. User can select “permitted” to enable the system by-pass function, or select “forbidden” to disable the system by-pass function.

Please be cautious when selecting the system by-pass function. For example, in water supply system, the pump is driven at a low speed by the VFD under a given water pressure. And when the by-pass circuit suddenly drives the motor to full speed, it will cause the water pressure to rise immediately and may endanger the safety of the pipe network as well as the valve.

The cell by-pass function and the system by-pass function are two different concepts. Allowing the cell by-pass function is based on the by-pass circuit of the VFD’s inner power cell, the VFD will operate on a derating level without stopping. The system by-pass circuit occurs only when the VFD is experiencing serious fault, the entire VFD system will exit operation.

The system bypass is also different from the soft start. The motor can be connected to the line by the system bypass circuit under any probable frequency, so the impact caused by the system by-pass circuit to the power line, motor and mechanicals may be far greater than the soft start. Therefore, the over current capability of the by-pass circuit switch should be considered as the motor starts directly.


29

4.2.7 cabinet gates interlock The cabinet gates control set-up determines whether the cabinet gates of the VFD are allowed

to open during the operation of the medium voltage VFD system. If the set-up permits such action, then the opening of the cabinet gates will only set the alarm without interfering the VFD’s operation. If the cabinet gates control set-up forbids such action, the VFD will trip off and perform emergency stop .

4.2.8 valve linked

User setup function, determine whether the valve is enabled to be controlled by the VFD.


30

4.3 Parameter button

Parameter set-up window is used for setting parameters of VFD and motor. Press

button in main interface to enter. First, enter interface “user login” (shown in figure 4.4), choose

“user name” and press button to confirm authorities with correct password

(default blank for operator, default 111 for manager, default 222 for master). Set-up authority must be required to assure data safety when changing parameters. Otherwise, set-up/modification will be denied and the authority limitation will be prompted (shown in figure 4.5).

Figure 4.4 user login interface

Figure 4.5 authority limitation dialog

When user has authority to change parameters, double-press number bar corresponding to the parameter. There will be a soft keyboard for parameter set-up. Press “ OK” button to return main interface after changing parameter. The modification of all parameters will be transferred to VFD automatically and come into effects immediately. If interface shows “parameter transfer is fault”, parameter modification is in failure this time. User should check communication connection; Pressing “ cancel” button will cancel all the modifications and the parameters will remain their previous values.


31

Figure 4.6 parameter set-up dialog

Figure 4.7 parameter transfer in failure dialog Parameter which can be set includes: speed set-up, control parameter, debugging parameter,

motor parameter, super setting and auto measure.


32

4.3.1 Speed set-up Speed set-up includes: basic parameter and speed ramp set-up.. 4.3.1.1 Basic parameter set-up

Press icon in item in left task bar of parameter interface. Basic parameter dialog appears, including parameters in figure 4.8. Each parameter function is shown in chart 4.1.

Figure 4.8 basic parameter interface

Starting frequency

The starting frequency of VFD. Its range is 0.1~50Hz, resolution is 0.01Hz, default value is 0.5Hz. The parameter can be written in and operator authority is required at least. Note: the set-up takes effect only when choosing “ normal start-up” in “ start-up mode” of “function” content and choosing “VVVF control” in “ motor control mode” of “control parameter” content.

Min frequency

The minimum output frequency of VFD. During the stopping procedure, VFD will shut off when preset frequency drops below the minimum output frequency. Its range is 0.5~50Hz, resolution is 0.01Hz, default value is 10Hz. The parameter can be written in and operator authority is required at least.

Max frequency The maximum output frequency of VFD. Its range is 0.5~50Hz, resolution is 0.01Hz, default value is 50Hz. The parameter can be written in and operator authority is required at least.

Reference voltage The output voltage of motor when it operates under base frequency. Its range is 100~90000V, resolution is 1V, default value is 6000V. The parameter can be written in and operator authority is required at least.


33

VFD output voltage remains base voltage when its operation frequency exceeds base frequency.

Reference frequency The operation frequency when VFD outputs base voltage. Its range is 0~500Hz, resolution is 0.01Hz, default value is 50Hz. The parameter can be written in and operator authority is required at least.

Torque boost

Increase motor torque in low speed area. Its range is 0~16. Choosing 0 will result in no increase while choosing 16 will result in maximum increase. The parameter can be written in and operator authority is required at least.

Skip frequency 1 lower limit

The lower limit of the first skip frequency point. Its range is 0~50Hz, resolution is 0.01Hz. The parameter can be written in and operator authority is required at least.

Skip frequency 1 upper limit

The upper limit of the first skip frequency point. Its range is 0~50Hz, resolution is 0.01Hz. The parameter can be written in and operator authority is required at least.

Skip frequency 2 lower limit

The lower limit of the second skip frequency point. Its range is 0~50Hz, resolution is 0.01Hz. The parameter can be written in and operator authority is required at least.

Skip parameter 2 upper limit

The upper limit of the second skip frequency point. Its range is 0~50Hz, resolution is 0.01Hz. The parameter can be written in and operator authority is required at least.

Chart 4.1 Basic parameters are mainly set in the first time of VFD start-up. Min/max frequency is set

up according to long-term operation frequency in field; starting frequency and torque boost determine jumping-off point of motor operation curve. set starting frequency and torque boost in order to conquer static torque when VFD starts up in static; the two skip frequency points are usually set according to field status. For example, fan and pump are easy to bring machine resonance and fan surge at certain frequency points. User can set up the two skip frequency points to skip resonance point and surge point, assuring VFD to operate stably in fixed frequency section.

Note: engineers of manufacture will set up above parameters in chart 4.1 according to the status in field. Please do not modify the parameters at random after coming into operation.

4.3.1.2 Speed ramp set-up

Press icon in item on left task bar of parameter interface.


34

Speed ramp set-up dialog appears, including parameters shown in figure 4.9. Each parameter function is shown in chart 4.2.


35

Figure 4.9 speed ramp set-up interface

Frequency point 1 Segmented speed regulation parameter of VFD. Its range is 0~50Hz, resolution is 0.01Hz, default value is 50Hz. The parameter can be written in and operator authority is required at least.

Frequency point 2 Segmented speed regulation parameter of VFD. Its range is 0~50Hz, resolution is 0.01Hz, default value is 50Hz. The parameter can be written in and operator authority is required at least.

Acceleration time 1 VFD acceleration time from 0Hz to frequency point 1. Its range is 1~1000s, resolution is 0.1s, default value is 30s. The parameter can be written in and operator authority is required at least.

Deceleration time 1 VFD deceleration time from frequency point 1 to 0Hz. Its range is 1~1000s, resolution is 0.1s, default value is 60s. The parameter can be written in and operator authority is required at least.

Acceleration time 2 VFD acceleration time from frequency point 1 to frequency point 2. Its range is 1~360s, resolution is 0.1s, default value is 1s. The parameter can be written in and operator authority is required at least.

Deceleration time 2 VFD deceleration time from frequency point 2 to frequency point 1. Its range is 1~360s, resolution is 0.1s, default value is 1s. The parameter can be written in and operator authority is required at least.

Acceleration time 3 VFD acceleration time from frequency point 2 to maximum frequency point . Its range is 1~360s, resolution is 0.1s, default value is 1s. The parameter can be written in and operator authority is required at least.

Deceleration time 3 VFD deceleration time from maximum frequency point to frequency point 2. Its range is 1~360s, resolution is 0.1s, default value is 1s. The parameter can be written in and operator authority is required at least.

Chart 4.2


36

Relative parameters of segmented speed regulation includes: frequency point 1, frequency

point 2, acceleration time 1, deceleration time 1, acceleration time 2, deceleration time 2, acceleration time 3, deceleration time 3.

During the procedure of acceleration and deceleration, motor can operate with different acceleration time or deceleration time under different frequency sections. Acceleration time is duration of motor accelerating from minimum frequency to maximum frequency in a frequency segment. Deceleration time is duration of motor decelerating from maximum frequency to minimum frequency in a frequency segment. Frequency point 1 and frequency point 2 divide the whole frequency range into three segments in which different acceleration/deceleration time is applied. For frequencies between minimum frequency and frequency point 1, motor will operate in acceleration time 1 or deceleration time 1. For frequencies between frequency point 1 and frequency point 2, motor will operate in acceleration time 2 or deceleration time. For frequencies between frequency point 2 and maximum frequency point, motor will operate in acceleration time 3 or deceleration time 3.

Warning: when acceleration time is too short, it may cause over current fault of VFD; when deceleration time is too short, it may cause over current fault of VFD and over voltage fault of power cell.

4.3.2 Control parameter


Control parameter dialog appears, including parameters shown in figure 4.10. Each parameter function is shown in chart 4.3.


37

Figure 4.10 control parameter interface

Motor control mode

“VVVF control” or “vector control” can be selected

VVVF control: U/F ratio control Vector control: applicable to asynchronous motor only and following conditions must be required. (1) Set up correct resistance and inductance

parameter for asynchronous motor’s stator and rotor .

(2) Phase sequence of output voltage & output current are correct.

Maximum

bypass number Allowable number of cell-bypass when power cell is in failure

The parameter must be less than cascaded level number of VFD

PWM regulation coefficient

Regulation coefficifent of output voltage

The coefficient makes linear affection to output voltage amplitude of VFD. It can be regulated to make output voltage be rating when VFD operates with motor under rated frequency.

Debugging without input

voltage

Used for electric control debugging in field without HV

After the debugging of electric control logic, user must set “ debugging with HV” and then VFD can operate with motor normally.

Over current protect

Output current trip-off immediately

Set the parameter two times more than motor rated current. Unit: A

VVVF start-up mode

“Normal start-up” or “ rotating start-up” can be selected

Normal start-up: VFD accelerates from starting frequency to fixed frequency. Rotating start-up: used for driving asynchronous motor only and the following conditions must be required: (1) Set up correct resistance and inductance parameter


38

for asynchronous motor’s stator and rotor . (2) Phase sequence of output voltage & output current

are correct.

Motor backspin allowance

“ motor backspin” in “function” dialog of HMI takes effect when “allowance” is set up.

When “ motor backspin” takes effect, motor will decelerate to shut-off gradually if it is operating forward, and then accelerates to fixed frequency in backspin. Operation frequency is minus on show while fixed frequency is plus.

Excitor regulation

VFD is allowed to regulate synchronous motor’s excitor.

It is required to set up relative parameters in “ excitor control” item if user choose “allowance”.

Chart 4.3

Attention: in adjustment procedure, if operator finds that VFD output voltage is not matching to rated voltage, operator can regulate “PWM regulation coefficient” to make output voltage and rated voltage be matching. Please assure correct parameter set-up for above parameters.

4.3.3 Debugging parameter

Press icon in item on left task bar in parameter interface.

Debugging parameter dialog appears, including following parameters shown in figure 4.11. Each parameter function is shown in chart 4.4.


39

Figure 4.11

Minimum of analogue signal

Minimum current of analogue input. Default value is 4mA. Unit: mA

Maximum of analogue signal

Maximum current of analogue input. Default value is 20mA. Unit: mA

Analogue relationship

Analogue input range corresponding to field data range: (1) corresponding 0~maximum value; (2) corresponding minimum value~maximum value;

Delay of HV supply After supplying HV to VFD, take self-detection later in order to eliminate self-detection fault resulting from HV disturbance.

Unit: 0.1s Acutul time=fixed value*0.1s

Allowable time of power-failure

1 VFD is in operaion; 2 set “vector control” in “motor control mode” or set “rotating start-up” in “VVVF start-up” ; 3 HV trip-off for VFD; 4 HV recover after failure; In above conditions, VFD will identify and run after motor speed to drive motor if time from trip-off to recover is less than fixed time; VFD will enter stand-by state if time from trip-off to recover is more than fixed time.

Unit: 0.1s. Acutul time=fixed value*0.1s

Light overload current ratio

If VFD’s output current ratio exceeds the fixed value, VFD will decrease output frequency gradually until output current not exceeding rated current. Attention: during the procedure:

Ratio of VFD output current and rated current


40

(1) when time for recovery from fault is not up, VFD has to operate under low frequency.

(2) When time for recovery from fault is up, VFD will work normally after coming back fixed frequency.

Light-load recovery time

When VFD’s output current exceeds fixed value of “light overload current ratio”, VFD will decrease output frequency automatically to make current drop-down. There is a duration for VFD to come back rated current. The duration is “ light-load recovery time”.


Heavy overload current ratio

1 VFD’s output current ratio exceeds the fixed value; 2 exceeding fixed value of “ heavy overload time”; In all above conditions, VFD will show “overload” and stop output immediately.

Ratio of VFD output current and rated current

Heavy overload time

It is time in which VFD’s output current ratio is allowed to exceed heavy overload current ratio. VFD keeps operating within the fixed time while stop output beyond the fixed time.


Delay time of light fault

1 light fault of power cell: low-voltage, lack-phase, overheat; 2 delay time of light fault: allowable time of power cell in light fault. If power cell is in light fault, controller will report light fault to PLC via I/O; if light fault eliminates within delay time of light fault, controller will stop transferring signal to PLC, VFD operates normally. If duration of light fault exceeds parameter of “delay time of light fault”, VFD will autobypass the fault cell and send cell-bypass alarming signal.


Allowable time of earth

1 when controller detects output single-phase earth, “VFD status” bar of HMI will show “output earth operation” and controller sends “light fault alarming” signal to PLC. Within time of “allowable time of earth”, if earth fault eliminates and the status lasts more than 10s, controller will cancel the alarm to PLC and not show alarm on HMI. Beyond time of “allowable time of earth”, VFD will show heavy fault on HMI and shuts off. 2 when “allowable time of earth” is set 18000(1800s) VFD keeps operating and not shuts off for earth fault .


chart 4.4 4.3.4 Motor parameter



41

Motor parameter dialog appears, including parameters in figure 4.12. Each parameter function is shown in chart 4.5.

Figure 4.12

Rated voltage Rated voltage of load motor Rated current Rated current of load motor Rated frequency Rated frequency of load motor Rated power Rated power of load motor

Rated efficiency Ratio of active power and total power of load motor

Rated speed

Rotating speed of load motor under rated voltage and rated frequency

Attention: set input/output voltage/current turn-coefficient according to the rated voltage and rated current fixed. Copy rated voltage, rated current, rated frequency, rated power, rated speed, No of pole pairs according to motor nameplate, set rated efficiency according to status in field.

Number of pole pairs of motor Number of pole pairs of motor Number of pole pairs = Number of

poles/2 Chart 4.5

4.3.5 Super setting

Press the button “Super setting”on the interface of “Parameter set-up ”,then you will find the

window of “Super setting”,as shown in figure 4.13 .

“Super setting”


42

Figure 4.13 super setting interface

The “super setting” has six types of function parameters, including“Motor Model

Parameter”、“Sampling Scaler”、“Offset Correction”、“Vector Control Related”、 “Other Setting”.

4.3.5.1 Motor Model Parameter

Press the “super setting” button on the interface of “Parameter setting-up ”, then press the

“Motor Model Parameter”button, a pop-down list will pop out, as shown in figure 4.14.

For detailed description of each parameter, please refer to function table 4.6.

“Motor Model Parameter” button


43

figure 4.14 Motor Model Parameter

Conditions:

1、 If the load of the VFD is an induction motor, and

2、 “Motor control mode” is defined as“vector control”, or

3、 “Motor control mode” is defined as “VVVF control”, and “VVVF start-up mode” is

selected as “spin start-up”,

4、 then the following “table 4.6” must be set.

Parameter

name Value unit

Rs Rs：stator resistance Ohm

Rr Rr：rotor resistance Ohm

Ls Ls：stator armature inductance H

Lr Lr： rotor armature inductance H

Lm Lm：stator and rotor mutual inductance

These five

values can be

auto-measured

by the VFD. H

J J：motor moment of inertia ( including load ) KG·M2


44

Rs_mes Rs auto measured value Ohm

Rr_mes Rr auto measured value Ohm

Ls_mes Ls auto measured value H

Lr_mes Lr auto measured value H

Lm_mes Lm auto measured value

H

Table 4.6 function description

Reminding:

The five indcution motor parameters listed in table 4.6 can be available in motor

manual or from manufacturer. If not, the VFD is provided with the function of

auto-measuring of induction motor parameters. Before auto-measuring, the following five

steps should be conformed to.

1、 Ensure that the phase-order of output voltage and current is correct. For detailed

description, please refer to the section about equipment commisioning.

2、 Ensure that the parameters of “Sampling Scaler”are correct. For detailed description,

please refer to chapter 4.3.5.2 .

3、 “Offset Correction”should also be done which is described in chapter 4.3.5.3 .

4、 The load is disconnected from the induction motor.

5、 The inverter is in ready state with the input high voltage on.

After the above five steps, auto-measuring can be done. If the measurement results are

positive real numbers,please fill the beginning five rows in table 4.6. Otherwise, the result is

inaccuracy!

4.3.5.2 Sampling Scaler

Press the button of “super setting”on the interface of “Parameter setting-up”, then you will

find the window of “super setting”.Press the “Sampling Scaler”button ,a pop-down list will pop

out, as shown in figure 4.15. For detailed function description of each parameter, please refer to

the function table 4.7.

“Sampling Scaler”


45

figure 4.15 Sampling Scaler

Parameter name Description unit

Ia scaler Input current sampling scaler of phase current Ia

Ib scaler Input current sampling scaler of phase current Ib

Uab scaler Input voltage sampling scaler of line voltage Uab

Ubc scaler Input voltage sampling scaler of line voltage Ubc

Iu scaler Output current sampling scaler of phase current Iu

Iv scaler Output current sampling scaler of phase current Iv

Uuv scaler Output voltage sampling scaler of line voltage Uuv

Uvw scaler Output voltage sampling scaler of line voltage Uvw

table 4.7 function description

Reminding:

（1） For different inverter voltage and power,the “Sampling Scaler”value is different.

Generally, the “Sampling Scaler”value has been set correctly before sale,so the user

need not modify the parameter.

（2） Once the“Sampling Scaler”value is modified , the parameters of “Offset


46

correction” in table 4.7 will ba affected. Then offset check should be taken and

fill the table 4.7.

4.3.5.3 Offset correction

Press the button of “super setting”on the interface of “Parameter setting-up ”, you will

find the window of “super setting”.Then press the “Offset correction”button ,a pop-down

list will pop out, as shown in figure 4.16. For detailed function description of each

parameter, please refer to the function table 4.8.

figure 4.16 offset correction

Parameter described as followoing：

Parameter name value unit

Ia offset Input current offset correction of phase A

Ib offset Input current offset correction of phase B

Uab offset Input voltage offset correction of line A-B

Ubc offset Input voltage offset correction of line B-C

Iu offset Output current offset correction of phase U

“Offset correction”


47

Iw offset Output current offset correction of phase W

Uuv offset Output voltage offset correction of line U-V

Uvw offset Output voltage offset correction of line V-W

Table 4.8 Offset Correction

1、 Fill in “table4.7” with correct value, as described in Chapter 4．3.5．2.

2、 Make sure that the VFD is not supplied with high voltage.

3、 Make offset correction, and fill in table 4.8.

4、 Once the parameters in the table 4.7 are modified, offset correction should be taken again.

4.3.5.4 Vector Control Related

Press the button of “super setting”on the interface of “Parameter setting-up ”, you will find

the window of “super setting”. Then press the “Vector Control Related”button ,a pop-down list

will pop out, as shown in figure 4.17. For detailed description of each parameter, please refer to

the function table 4.9.

figure 4.17 Vector control related

Condition:

1、 If the load of the VFD is an induction motor, and

“Vector Control Related” button


48

2、 “Motor control mode” is defined as“vector control”, or

3、 “Motor control mode” is defined as “VVVF control”, and “VVVF start-up mode” is

selected as “spin start-up”,

4、 then table 4.6 must be set.

Parameter value unit

Rotor flux reference

Rotor flux reference, the value is getted

from“table 2-11” According to rated voltage and

rated power

Wb

Max electromagnetic

torque limit

Generally the value is set as 120% of rated

torque N·M

Max Power limit as motor Generally the value is set to be 100% of rated

power. W

Max Power limit as

generator Generally the value is 0.1 times of rated power. W

Rotor flux filter coefficient 36

Rotor speed filter

coefficient 60

Synchronous speed filter

coefficient 732

Current loop coefficient 1200

Speed loop kp 78

Speed loop ki 41

Generally there’s no need

to modify these values.

Rs measurement I1

The current which is used to auto-measure stator

resistance. Generally the value is 30% of rated

current.

A

Rs measurement I2

The current which is used to auto-measure stator

resistance. Generally the value is 70% of rated

current.

A


49

Blocked rotor test current

The current which is used to auto-measure

armature of stator and rotor.Generally the value

is 70% of rated current.

A

Speed sensor Enable vector control with/without speed sensor

Pulse number per round of

encoder

Pulse number per round of encoder, according to

different encoder type

Current loop adaptive

enable

Enable current loop coefficient self-adaptive

according to different rotor speed

Max positive torque

current limit Max positive torque current limit

Max negtive torque current

limit Max negtive torque current limit

Table 4.9

Rated

voltage（V）

rated power

（HZ）

Rotor flux

reference（WB）

Rated voltage

（V）

Rated

power（HZ）

Rotor flux

reference

（WB）

3,000 50 7.25 3,000 60 6.04

3,300 50 7.98 3,300 60 6.65

6,000 50 14.5 6,000 60 12.1

6,600 50 16.0 6,600 60 13.3

10,000 50 24.2 10,000 60 20.1

11,000 50 26.6 11,000 60 22.2

Table 4.10

Reminding: rated electromagnetic torque=( rated power*60)/( 2π* rotate speed* number of

pair of poles)

4.3.5.5 other setting

Press the button of “super setting”on the interface of “Parameter setting-up ”, you will find

the window of “super setting”. Then press the “other setting”button ,a pop-down list will pop out,

as shown in figure 4.18. For detailed description of each parameter, please refer to the function


50

table 4.11.

Figure4.18

Parameter name value unit

VVVF fly-startup

time

If “Motor control mode” is selected as “VVVF control”, and

“VVVF start-up mode” is selected as“spin start-up”, the VFD

runs vector control firstly for a defined time. Then the VFD

auto-changes to “VVVF control”mode.The defined time is

VVVF fly-startup time.

Line voltage

recovery time

For the input line voltage from lost to restore, the VFD needs

to wait for a defined time. The defined time is called “Line

voltage recovery time”.

Error check

number

By setting “Error check number”, the main control

system can improve its abilities of avoid disturbance. If the

disturbance disappears before the number is arrived, the VFD

will continue to work. Otherwise it will emergently stop.

Table 4.11

“other setting” button


51

4.3.6 Auto measurement

Press the button of “Auto measure”on the interface of “Parameter setting-up ”,then a

pop-down list will pop out, as shown in figure 4.19. “Auto measure” function has two items:

“offset check”、“motor check”.

Figure 4.19 Auto measure

4.3.6.1 offset correction

Press the button of “Auto measure”on the interface of “Parameter setting-up ”,then you will

find the window of “Auto measure”.pressing the “Offset correction”button ,a drop-down list will

pop out!(looking figure 4.20).

“Auto measure”button


52

figure 4.20

Attention please:

Before performing “Offset correction” function, you should follow three steps in orders:

1、Ensure the value in the table of“Sampling Scaler”is correct, referring to table 4.7 in chapter

4.3.5.2;

2、The VFD isn’t supplied with high voltage；

3、In the interface of “offset correction”, press the “begin” button, the system will auto check the parameter. After that, the result will be displayed in the window, now you can fill “table 4.8” with the auto-measured results；

4.3.6.2 Motor check

Press the button of “Auto measure”on the interface of “Parameter setting-up ”, then you

will find the window of “Auto measure”. Click the “Motor check”button ,a pop-down list will pop

out, as shown in figure 4.21.


53

figure 4.21

“Motor check”function is related with “Motor Model Parameter”in chapter 4.3.5.1. In order

to auto-measure induction motor parameters listed in table 4.6, next five steps should be followed:

1、Ensure the phase-order of output voltage and current is right. Please refer to the section

about equipment debugging.

2、Ensure the setting value of “Sampling Scaler”is correct, as shown in the chapter 4.3.5.2.

3、Take offset correction explained in chapter 4.3.5.3.

4、Make sure that the load is disconnected from the induction motor.

5、The VFD is in ready state with the input high voltage on.

6、Notice: The motor will rotate while the auto measuring program is running, make sure that

there’s no people is working on the motor.

When the above six steps is done, press the button of “begin”,the system will run parameter measuring program automatically. When the procedure is done, the result will be displayed in the window. If the results are positive real numbers, please fill in the table 4.6 with them. Otherwise, the results are not correct! Please start from the scratch of “Motor check”, as shown in chapter 4.3.6.2


54


55

4.4 Wave button Press the button of “wave display”on the interface of “Parameter setting-up”, then you will

find the window of “wave display”, as shown in figure 4.22. The VFD has the function of

displaying related parameter wave listed in table 4.12.

figure 4.22 wave interface

With button “wave type 1” and “wave type 2”, you can select the parameter waveform in the

pop-down list:

Parameter name means unit

Output current Iu u-phase current wave

Output current Iv v-phase current wave

Output current Iw w-phase current wave

Output phase voltage Uu u-phase voltage wave

Output phase voltage Uv v-phase voltage wave

Output phase voltage Uw w-phase voltage wave

Input current Ia A-phase current wave

Input current Ib B-phase current wave


56

Input current Ic C-phase current wave

Input phase voltage Ua A-phase voltage wave

Input phase voltage Ub B-phase voltage wave

Input phase voltage Uc C-phase voltage wave

Input active power Input active power wave

Input reactive power Input reactive power wave

Output active power Output active power wave

Output reactive power Output reactive power wave

Input power factor Input power factor wave

Output power factor output power factor wave

Rotor flux amplitude Rotor flux amplitude wave

Rotor flux reference Rotor flux reference wave

ISD stator excitation current

ISQ stator torque current

ISA In α-βaxes system, stator current branch

value along α-axes.

ISB Inα-βaxes system, stator current branch

value along β-axes.

ual inα-βaxes system, stator voltage branch

value along α-axes.

ube inα-βaxes system, stator voltage branch

value along β-axes.

ualc inα-βaxes system, calculated stator voltage

branch value along α-axes.

ubec inα-βaxes system, calculated stator voltage

branch value along β-axes.

VSAL_REF inα-βaxes system, stator referrence voltage

branch value along α-axes.

VSBE_REF inα-βaxes system, stator referrence voltage


57

branch value along β-axes.

Table 4.12

Press button ,you can move parameter waveform upward in Y axes. Reversely, press

button . Press button ,the waveform is dwindled along X axes,but the

value of Y axes keeps the same. Otherwise press button . To stop the parameter

waveform , please press button .


58

4.5 Operation data record

HARSVERT-A series VFD can record run-time data automatically. User can have access to the record of every previous operation and its corresponding time. For example, user can select a specific date, press the “Display” button and the runtime record of that day will be displayed. The parameters recorded include given value, motor speed, input current, output current, input voltage, value controlled,control mode and operate action records. All information mentioned above is saved in text format together with the record time (simultaneously). All the files are stored in the hard disk of the PC. There is one file per day with the date as its filename. E.g. the file of 2003.5.24.txt is the runtime record of May 24, 2003. The “Record Interval” is used to set the record interval, and the system will record data according to the time interval specified by this parameter.

Fig 4.23 Operation record interface


59

4.6 Inquire Fault information HARSVERT-A Series VFDs support accurate fault position and inquisition function. User

can acquire current system status and fault history in fault inquisition window at any time. The fault time, reason and position is given for user to take corresponding measures. 4.6.1 Fault inquisition window

The fault message window will pop out and the current fault automatically in flashing mode when system fault occurs. User can use the Forward and Backward button to inquire the fault history. The fault information includes the status of the power cells, the transformer, the motor, the controller, the power cabinet cooling fans and other user parts.

Slight faults of the cabinet, UPS, motor, transformer and fans, which does not affect the operation of VFD, will be displayed on the main interface in real time. It disappears as soon as the fault is dismissed and the fault message window won’t automatically pop out.

A1~A8 in the window represent the status of the 8 power cells of phase A, B1~B8 represent those of Phase B, and C1~C8 represent those of Phase C. The number of cells per phase varies with different type of VFD. The “Delete” button is used to delete current fault record, and the “Delete all” button will clear the entire fault record history.

Figure 4.24 Fault message window 4.6.2 Fault information procession

User can take appropriate actions after receiving details such as the type of and the location of fault through the fault message window.


60

4.7 SetTool Of The High-Voltage Inverter System To meet various requirements of the users, considering to the different controlled members,

interfaces and user logic, a setTool is planed in the high-voltage inverter system, With which the users can configure the field parameters before running the high-voltage inverter’s main and upper monitor interface. 4.7.1 Login, user management and data authority management

Login:click ，shown in figure 4.25，Input the username and password to

login and the user authority will be determined. (operator’s default password is 0; manager’s

default password is 111; master’s default password is 222). The main interface of setTool is shown

in figure 4.26:

Fig4.25 Login window


61

User management: as shown in figure 4.27, the user management interface appears when click the “User Management” icon in the right task bar “User Management” of the setTool. The list of authorized users in the dialog is allowed access to the SetTool, main and upper monitor interface. There are also different authority limitations for different users (the capability to modify, add, delete users and assign different authorities). The user authority is divided into operator, manager and master. Operator is allowed to use the basic functions such as power on and power off, he/she will be the worker on duty in the monitor station. Manager acts as field project manager or project designer and repairman, who has all the user authority of the operator and in addition can modify the field self-defining configurations. Master has the user authority of both the operator and the manager. In addition, he/she can also modify the core parameters of the system, which are crucial for system performance. User identification and relative authority must be checked before log in to achieve uniformed authority management.

Fig4.26Main interface of the setTool of high-voltage inverter


62

Date authority management :Different user has different data operating authority to assure the data safety and the authority limitations will be prompted. (Shown in figure 4.28)

Fig4.27 System Configuration tool

Fig4.28 User management


63

If the system control capabilities were limited by the user authority, user must log in again with higher authorizations (click the “log out” icon in “User Management” dialog, shown in figure 4.25) to complete desired tasks. 4.7.2 Configuration of basic parameters of the control system From the main interface of SetTool (shown in figure 4.27), user can access information such as the system version number of the main controller, configure the system accumulative run time, inverter type, number, series and controller type（c196、DSP、196MBUS）.

Click the icon to access the version number of each control

element. The data displayed cannot be set or modified.

To configure the cumulative run time of the inverter since the

beginning of usage.

To configure the inverter type according to the data plate.

The configuration of the inverter numbers. Upper computers can

centrally monitor HARSVERT-A series inverters. Each computer

can identify and monitor 32 inverters with the different inverter

numbers that are defined by the interface.

To configure the series of inverters.

Lang_en_us is ENGLISH; Lang_zh_cn is CHINESE; Lang_russia

is RUSSIAN;

Choose controller type：DSP、C196、196MBus；

when this item is selected, relative commands skip PLC and are

directly sent to the control unit. When it is unselected, relative

commands are sent to PLC and PLC controls the VFD in a unified

manner. This selection is designed for the debugging. During

normal operation, it should not be selected.

Fig4.28 Need manager license window


64

4.7.3 Function lock set-up

Click: , shown in figure 4.29.

Function lock configuration: in local/remote mode, define the lock mode by configuring the function lock. Enable/disable the lock of schedule mode, preset mode, initiate mode and run mode of the system. All the functions run automatically as the function lock set (shown in figure 4.29). 4.7.4 Sampling scaler


List4.13

Fig4.29 Function lock set-up window


65

4.7.5 PID Regulation


Fig4.30 Sampling scaler window


66

Input the PID parameters when PID regulation is enabled. When necessary, proportion coefficient,

integral coefficient and differential coefficient of the PID regulator can all be modified during

operation. The new parameters are immediately effective after the “OK” button is pressed.

PID regulator’s proportional coefficient can be positive, negative or 0. Greater absolute value of the proportional coefficient can increase the speed of regulation. However, there would be overshoot and vibration in the system when the proportional coefficient is too high. When the integral coefficient and the differential coefficient are positive, and the proportional coefficient is positive, the regulator does positive regulation. In other words, if the given value is greater than the feedback value, the VFD will increase operation frequency. And when the given value is smaller than the feedback value, the VFD will decrease operation frequency. Take constant pressure water supply for example: If the given water pressure is greater than the actual pressure, the VFD will increase output frequency to accelerate pump, therefore increase the actual pressure to match the given value. When the integral coefficient and the differential coefficient are positive, but the proportional coefficient is negative, the regulator does negative regulation. In other words, if the given value is greater than the feedback value, the VFD will decrease operation frequency. And when given value is smaller than feedback value, the VFD will increase operation frequency. Take forced air cooling constant temperature control system for example: If the given temperature is greater than the actual temperature, the VFD will decrease output frequency to decelerate fan, therefore increase the actual temperature to the given value. When there is no need for proportional regulation, the proportional coefficient should be set to zero. Integral and differential regulation are still effective when proportional coefficient is zero. The regulator would make the integral and the differential calculations as if the proportional coefficient is 1. If proportional coefficient is not zero, integral and differential regulation will be affected when proportional coefficient changes.

Fig4.31 PID Regulation window


67

PID regulator’s differential time constant can be positive, negative or 0, with the unit of second. It is generally set positive. The differential coefficient can only be set to a negative value when there is no need for proportional regulation; only differential regulation is needed and the regulation is negative. Increasing the absolute value of this parameter will fasten the responds of adjuster. When the proportional coefficient is positive or 0, and differential coefficient is set to a positive value, the VFD does positive regulation. If the given value increases or the feedback value decreases abruptly, it increases the operation frequency. When the proportional coefficient is positive or 0, and the integral coefficient is set to a negative value, the VFD does negative regulation. If the given value increase or the feedback value decrease abruptly, it decreases the operation frequency. If no differential regulation is needed, it should be set to zero.

PID regulator’s integral time constant can be positive or negative, but never 0, with the unit of second. It is generally set to a positive value. The integral coefficient can only be set to a negative value when there is no need for proportional regulation, only integral regulation is needed and the regulation is negative. Increasing the absolute value of this parameter will slow down the responding of the regulator. When the proportional coefficient is positive or 0, and the integral coefficient is set to a positive value, the VFD does positive regulation. If the given value is greater than the feedback value, it increases the operation frequency. Otherwise, the operation frequency decreases. When the proportional coefficient is positive or 0, and the integral coefficient is set to a negative value, the VFD does negative regulation. If the given value is greater than the feedback value, it decreases the operation frequency. Otherwise, the operation frequency increases. If there is no need for integral regulation, the integral coefficient should be set to infinity.

The Calculate time period of the PID regulator, with the unit of second. It should be positive. It can’t be negative


68

or zero. The default sampling time is set to 0.1 second. Users are recommended not to change the sampling time unless it’s necessary.


4.7.6 System function set-up

System function set-up is active only when the VFD is stopped, and the interface is showed in

figure. 4.33.

Fig4.32 Proportional coefficient window

List4.14


69

4.7.7 Segmented speed regulation


Fig4.33 System function set-up window


70

4.7.8 Communication port configuration


Configure the properties of the communication port before running the main monitor interface. As shown in figure 4.6, the port number, baud rate, character length, check mode, stop bit length and shaking mode of each port (PLC port, upper computer port, temperature sampling port, remote monitoring port) can be configured in the interface to communicate the industrial PC and other equipments properly. The default configuration of PLC port is: baud rate 9600, character 8, even parity check, one stop bit, and no shaking mode. The default configuration of upper computer port is: baud rate 9600, character 8, even parity check, one stop bit, and no shaking mode. The default configuration of temperature sampling port is: baud rate 9600, character 8, no check mode, one stop bit, and no shaking mode. The default configuration of remote monitoring port is: baud rate 9600, character 8, even parity check, one stop bit, and no shaking mode. 4.7.9 Define the object controlled


Fig4.36 Port settings window

Fig4.35 Speed ramp window


71

As shown in figure 4.37, water pressure/Mpa, flux/m3/h, wind pressure/Pa, water level/m, etc can be defined in the interface to match the actual environment of user, and fulfill usage requirements in different industries. Defining user name can also modify the contents of the title bar. 4.7.10 Addition, deletion and modification of field analogue input


Fig4.37 Controlled object setting window


72

To meet the requirements of different users, the definition and the display of the field analogue input can be configured in the system. As shown in figure 4.9, “Analogue Input” dialog appears when click the “Analogue Input Definition” icon in the left task bar “Parameter Configuration” of the setTool (administrator only). By editing the definition of the analogue input, users can increase or reduce the input channels, define the contents and units of the spare parameters relating to the channels, as well as modifying the channels and parameters that have already been defined. For example, define the name of “Channel 1” as “Field Input”, the unit is “Mpa”, the name of parameter “1” of the “Channel 1- Field Input” is “Offline Value”; define the name of “Channel 2” as “Open Loop Min Frequency”, the unit is “Hz”; define the name of “Channel 3” as “Open Loop Max Frequency”, the unit is “Hz”; define the name of “Channel 4” as “Parameter 1”, the unit is “Mpa”. To modify the pre-set demo channel name, highlight the appropriate channel and click the “modify” icon, then input the new name into the dialog. Click the “Modify” icon again to complete the command. Based on the defined channels, user can modify the range of apparatus, the relationship between the range and the current or the voltage and the value of the spare parameters (shown in figure 4.10) in the analogue input dialog. Click the “Display On Interface” multi-dialog, the values of the channel will display as the “Field Data” on the main and upper interface of the system (shown in figure 5.16). For example, set the analogue input of the certain field channel current source in the dialog, output range 5 ～ 20 mA, accordingly measurement range of field data 0.5 ～ 10 Mpa, the preset mode is analogue mode, closed loop. Then the system can run on a controlled value by the A-D conversion according to the relationship mentioned above. At the same time user set the offline threshold value of the signal to 0.5 Mpa. If field value were lower than the preset threshold value, then it would signify that the channel is off line. The system can run on a

Fig4.38 Analogue input window


73

controlled value in open loop mode as well. The A-D conversion relationship of open loop is decided by the minimum and maximum frequency of the open loop. Parameter 1 is spare. It isn’t defined. Both current and voltage source analogue signal are accepted by the high-voltage inverter system. The choices of analogue signal are all invalid if the preset mode is “by computer mode”. Analogue feedback signal is decided by the properties of the feedback signal source. Please pay attention to the switching when configuring the signals. There are slight differences in signals switching between current and voltage sources. 4.7.11 Configuration of analogue output


The high-voltage inverter system supports 4 analogue output channels. Both current and voltage sources output are viable. The output signal can be configured to frequency, current, voltage, rotational speed, water pressure, etc. As shown in figure 4.11, “Analogue Output” dialog appears when clicking the “Analogue Output” icon in the toolbox (manager and administrator only). Choosing the channel number and the output contents, defining the sensor type and the relationship between the range and the current or the voltage to receive the required output signal. For example, set the “Channel 1” as the “System Frequency”, the range of the external ammeter is 4～20mA, the plate scale is 0～50 Hz, the configuration dialog is shown as the figure below.

Fig4.39 Analogue output window


74

4.7.12 PLC IO


4.7.13 Standard parameter configuration


Fig4.40 PLC IO window


75

To meet various requirements of different users, the parameters of the main controller can be extended in the system.. 4.7.14 Standard parameter menu configuration


Fig4.41 Parameter definition window


76

4.7.15 Parameter extension of PLC


Fig4.42 Parameter definition window


77

To meet various requirements of the users, the parameters of the PLC can be extended in the system. As shown in figure 4.40, PLC valve linking and panel interlocking are configured to the figure. According to the current configuration of the users, the panel interlock (open/close) and the valve link (on/off) can be controlled by the function configuration in the main monitor interface during operation (shown in figure 4.43). 4.7.16 Definition and display of field analogue input


Fig4.43 PLC definition window


78

Based on the defined channels, user can modify the range of apparatus, the relationship between the range and the current or the voltage and the value of the spare parameters (shown in figure 4.44) in the analogue input dialog. Click the “Display On Interface” multi-dialog, the values of the channel will display as the “Field Data” on the main. For example, set the analogue input of the certain field channel current source in the dialog, output range 5 ～ 20 mA, accordingly measurement range of field data 0.5 ～ 10 Mpa, the preset mode is analogue mode, closed loop. Then the system can run on a controlled value by the A-D conversion according to the relationship mentioned above. At the same time user set the offline threshold value of the signal to 0.5 Mpa. If field value were lower than the preset threshold value, then it would signify that the channel is off line. The system can run on a controlled value in open loop mode as well. The A-D conversion relationship of open loop is decided by the minimum and maximum frequency of the open loop. Parameter 1 is spare. It isn’t defined. Both current and voltage source analogue signal are accepted by the high-voltage inverter system. The choices of analogue signal are all invalid if the preset mode is “by computer mode”. Analogue feedback signal is decided by the properties of the feedback signal source. Please pay attention to the switching when configuring the signals. There are slight differences in signals switching between current and voltage sources. 4.7.17 Addition, deletion, definition and display of field digital node


Fig4.44 PLC Analogue input window


79

To match the requirements of different users, the definition and the display of the field digital signal can be configured in the system. As shown in figure 4.45, PLCIO dialog ejects when click the “PLC Signal Definition” icon in the left task bar “Parameter Configuration” of the setTool (administrator only). The main and upper monitor interface can display the field user’s I/O data accurately by defining the register bit, its field meaning and relative display mode. For example, define the VB 5.0 as the “Overheat” register in figure 4.45, the monitor interface prompts “Overheat” when it turn to “1”. According to the field situations, users can increase or delete the PLC register bit to extend the digital node in the configuration dialog.

Fig4.45 PLC IO window


80

4.8 The operation mode of medium voltage VFD system The VFD has several operation modes such as open loop, close loop, soft-start, stop,

Emergency stop, etc. Whatever mode the VFD is in, the start of the VFD can only proceed after system ready. Only when the controller and the motor are both ready, VFD is ready, the remote and local Emergency stop buttons released, and when there is no serious fault at the same time, the VFD will send “medium voltage permission” signal. When the system receives the “Medium voltage ready” signal, it will proceed to the ready mode. 4.8.1 Open loop

When the VFD is ready and the “remote” control is selected, the remote “start” command will trigger the VFD to start from the current state according to the preset acceleration time and finally reaching the user preset frequency. When the VFD is ready and the “local” control is selected, the remote “start” button becomes invalid, and the VFD can only be started from the industrial PC interface. 4.8.2 Close loop

If the close loop mode is selected in the function configuration of the industrial PC interface, the VFD will operate in close loop mode after start. In close loop mode, user could set the expected value of the controlled parameter (such as pressure, temperature etc.). And according to the actual value of the controlled parameter as well as the PID parameter set in the system, the VFD will regulate the speed of the motor automatically to match the actual value of the controlled parameter to the expected value.

4.8.3 Soft-start

When the VFD is in ready state and the “remote” control is selected, the remote “soft-start” command will becomes effective and triggers the VFD to soft start from the current state according to the preset acceleration time. Regardless of the preset frequency, the VFD will accelerate the actual frequency to the “switch to line” frequency set in the VFD, and then send the “Switch to line” command to control the user’s electric control circuit to switch the soft-started motor to the power line. The “switch to line” command is effective for 2 seconds, then the VFD would enter standby mode. When the “local” control and the “soft start” function are both selected, the “start” button on the main interface will send “soft-start” command. The process of soft start in the “local” mode is the same as in the “remote” mode.

4.8.4 Normal stop

When the “remote” control is selected, the remote “stop” button will trigger the VFD to decelerate to stop according to the preset system deceleration time. When the “local” control is selected, the “stop” button on the industrial PC interface has the same effects.

4.8.5 Emergency stop

Under any circumstances, the local “emergency stop” button and the “emergency stop” button on the PC interface are all valid simultaneously. When the system receives the emergency stop command or encounters serious fault, the PWM output of the power cells will be immediately inhibited, and the motor and the load will stop according to their own inertia.

Besides inhibiting the PWM pulses, the local “emergency stop” button can also disconnect the VFD from medium voltage power line. If the local “emergency stop” button is in effect, the


81

system will stop to give the medium voltage “close-switch permission” signal. Remote “emergency stop” button and the “emergency stop” button on the industrial PC interface do not have such function.


82

4.9 Safe & fast operate steps Before the first usage of the VFD, it is important for the user to select the “allow” option of

the “parameter set-up” in the function window of the main interface, and then input the parameters of the motor and the VFD in the parameter window! 4.9.1 Local control, computer preset, open-loop operation: Step 1 Switch on control power supply. Step 2 Use the “remote/local” switch on the cabinet to select the “local control” mode. Step 3 Enter the function set-up window of the main interface, and select computer

preset, start, and open-loop operation mode. Step 4 If there are any red warning signs other than the “medium voltage not ready” on

the main interface of the industrial PC, find out the cause and eliminate the warnings.

Step 5 The VFD will automatically sends out the “medium voltage switch-on permission” signal.

Step 6 Eliminate the “medium voltage not ready” warning by closing the input medium voltage switch of the VFD, the VFD will then send out “system ready” signal.

Step 7 Press “start” button at the main interface to start the VFD. Step 8 Press the “acceleration”, “deceleration” or “frequency preset” button on the main

interface to set the output frequency of the VFD. Step 9 The actual frequency of the VFD achieves the preset value according to the

acceleration and deceleration time. Step 10 Press the “stop” button or the “emergency stop” button on the main interface to

stop the VFD. 4.9.2 Remote control, analogue preset, open-loop operation Step 1 Switch on the control power supply Step 2 Use the “remote/local” switch on the cabinet to select the “local control” mode. Step 3 Connect the analogue signal to channel A in EM235 of PLC. Step 4 Enter the function window of the main interface, and select analogue preset,

start, and open-loop operation mode. Step 5 According to the actual condition of the system, select 0~10V analogue voltage

source or 4~20mA current source. Step 6 If there are any red warning signs other than the “medium voltage not ready” on



Step 8 Press remote “start” button to start the VFD. Step 9 Set the operation frequency with the remote analogue signal, and the analogue

preset frequency will be displayed on the main interface. Step 10 The actual frequency of the VFD achieves the preset value according to the

acceleration and deceleration time. Step 11 Press remote “stop” button or “emergency stop” button to stop the VFD.


83

4.9.3 Local control, computer preset, close loop operation Step 1 Switch on the control power supply. Step 2 Use the “remote/local” switch on the cabinet to select the “local control” mode. Step 3 Connect the feedback value of the controlled parameter to channel B in EM235 of

PLC. Step 4 Enter the function window of the main interface, and select computer preset,

start, and close-loop operation mode; then according to the actual condition of the system, select 0~10V analogue voltage source or 4~20mA current source.

Step 5 If there are any red warning signs other than the “medium voltage not ready” on the main interface of the industrial PC, find out the cause and eliminate the warnings.


Step 7 Press “start” button on the main interface to start the VFD. Step 8 Press “increase”, “decrease” or “controlled parameter” button on the main

interface to set the expected value of the controlled parameter. Step 9 The VFD will automatically regulate its output frequency to match the controlled

parameter to the expected value. Step 10 Press the “stop” button or the “emergency stop” button on the main interface to

stop the VFD. 4.9.4 Remote control, analogue preset, close loop operation Step 1 Switch on the control power supply. Step 2 Use the “remote/local” switch on the cabinet to select the “remote control” mode. Step 3 Connect the feedback value of the controlled parameter to channel B in EM235 of

PLC, and connect the preset analogue signal to channel A in EM235 of PLC. Step 4 Enter the function window of the main interface, and select analogue preset, start,

and close loop operation mode. Step 5 According to the actual condition of the system, select either the preset analogue

signal to be 0~10V voltage source or 4~20mA current source, and select either the analogue feedback signal to be 0~10V voltage source or 4~20mA current source.



Step 8 Press remote “start” button to start the VFD. Step 9 Set the expected value of the controlled parameter by the given analogue device,

and it will be displayed on the main interface. Step 10 The VFD will regulate its operation frequency automatically to match the

controlled parameter to the expected value. Step 11 Press the remote “stop” or “emergency stop” button to stop the VFD.


84

4.9.5 Local control, analogue preset, open-loop operation Step 1 Switch on the control power supply. Step 2 Use the “remote/local” switch on the cabinet door to select the “local control”

mode. Step 3 Connect the preset analogue signal to channel A in EM235 of PLC. Step 4 Enter the function window of the main interface, and select analogue preset, start,

and open-loop operation mode. Step 5 According to the actual condition of the system, select either 0~10V analogue

voltage source or 4~20mA current source; Step 6 If there are any red warning signs other than the “medium voltage not ready” on



Step 8 Press “start” button on the main interface to start the VFD. Step 9 Set the operation frequency of the VFD by the analogue signal, and it will be

displayed on the main interface. Step 10 The actual frequency of VFD achieves the preset value according to the

acceleration and deceleration time. Step 11 Press the “stop” button or the “emergency stop” button on the main interface

to stop the VFD. 4.9.6 Remote control, computer preset, open-loop operation Step 1 Switch on the control power supply. Step 2 Use the “remote/local” switch on the cabinet to select the “remote control” mode. Step 3 Enter the function window of the main interface, and select computer preset, start,

and open-loop operation mode. Step 4 If there are any red warning signs other than the “medium voltage not ready” on



Step 6 Press remote “start” to start the VFD. Step 7 Press “acceleration”, “deceleration” or “frequency preset” button on the main

interface to set the operation frequency of the VFD. Step 8 The actual frequency of VFD achieves the preset value according to the

acceleration and deceleration time. Step 9 Press the remote “stop” button or “emergency stop” button to stop the VFD. 4.9.7 Local control, analogue preset, close loop operation Step 1 Switch on the control power supply. Step 2 Use the “remote/local” switch on the cabinet to select the “local control” mode. Step 3 Connect the feedback value of the controlled parameter to channel B in EM235 of

PLC, and connect the preset analogue signal to channel A in EM235 of PLC.


85

Step 4 Enter the function window of the main interface, and select analogue preset, start, and close loop operation mode.

Step 5 According to the actual condition of the system, select either the preset analogue signal to be 0~10V voltage source or 4~20mA current source, and select either the analogue feedback signal to be 0~10V voltage source or 4~20mA current source.



Step 8 Press the “start” button on the main interface to start the VFD. Step 9 Set the expected value of the controlled parameter by the analogue signal, and it

will be displayed on the main interface. Step 10 The VFD will automatically regulate its operation frequency to match the

controlled parameter to the expected value. Step 11 Press the “stop” button or the “emergency stop” button on the main interface to

stop the VFD. 4.9.8 Remote control, computer preset, close loop operation Step 1 Switch on the control power supply. Step 2 Use the “remote/local” switch on the cabinet to select the “remote control” mode. Step 3 Connect the feedback value of controlled parameter to channel B in EM235 of

PLC. Step 4 Enter the function window of the main interface, and select computer preset, start,

and close loop operation mode; also select analogue feedback signal to be either 0~10V voltage source or 4~20mA current source.



Step 7 Press the remote “start” button to start the VFD. Step 8 Press “increase”, “decrease” or “controlled parameter” button on the main

interface to set the expected value of the controlled parameter. Step 9 The VFD will automatically regulate its operation frequency to match the

controlled parameter to the expected value. Step 10 Press the remote “stop” button or “emergency stop” button to stop the VFD. 4.9.9 Local control, soft-start operation Step 1 Switch on the control power supply. Step 2 Use the “remote/local” switch on the cabinet to select the “local control” mode. Step 3 Enter the function window on the main interface, and select soft-start operation

mode. Step 4 Enter the parameter window on the main interface, and set the “switch to line”


86

frequency. Step 5 If there are any red warning signs other than the “medium voltage not ready” on the

main interface of the industrial PC, find out the cause and eliminate the warnings. Step 6 Eliminate the “medium voltage not ready” warning by closing the input medium

voltage switch of the VFD, the VFD will then send out “system ready” signal. Step 7 Press the “soft-start” button on the main interface to start the VFD. Step 8 The VFD will automatically accelerate to the “switch to line” frequency and connect

the motor to the line. Step 9 The VFD will automatically stop before the switching over. 4.9.10 Remote control, soft-start operation Step 1 Switch on the control power supply. Step 2 Use the “remote/local” switch on the cabinet to select the “remote control” mode. Step 3 Enter the parameter window on the main interface, and set the “switch to line”

frequency. Step 4 If there are any red warning signs other than the “medium voltage not ready” on


Step 5 Eliminate the “medium voltage not ready” warning by closing the input medium voltage switch of the VFD, the VFD will then send out“system ready” signal.

Step 6 Press the remote “soft-start” button on the main interface to start the VFD. Step 7 The VFD will automatically accelerate to the “switch to line” frequency and

connect the motor to the line. Step 8 The VFD will automatically stop before the switching over.

If user press the remote “start” button during the soft-start process, the VFD will switch to the start mode automatically; If user press the remote “soft-start” button during the operation process, the VFD will switch to operate in the soft-start mode.


87

4.10 Caution ● VFDs are medium voltage dangerous devices. Therefore all operators must strictly follow the

operating regulations. ● The control power supply must be switched on first. After the VFD receives the permission to

close the input medium voltage switch, user can connect VFD to medium voltage power supply. ● When using the color touch-screen monitor, user only need to touch the screen lightly with

finger to operate. Avoid knocking forcefully or impacting with hard object. ●Non-operators are forbidden to touch the LCD screen to prevent misoperation. ● The VFD’s cabinet doors should not be opened during operation, otherwise the audio alarm system would be triggered.


88

4.11 The maintenance of VFD The HARSVERT -A series medium voltage VFDs are highly reliable and easy to maintain.

However, users are recommended the following maintenance schedule: ● Clean up the dust filter of the cabinet periodically, to ensure the ventilation of the air path. ● User should arrange for periodic inspections of VFD, and the temperature of the VFD’s

transformer winding should be checked and recorded regularly by the duty personals or maintenance personals. When operating under normal conditions, the temperature rise of the transformer winding should not exceed 80 .℃

●The transformer should be serviced annually since initial operation. Service includes clean up, insulated resistance measurement and the voltage test.

● User should check and fasten all electricity connecting bolts half a year.


89

Chap 5 Frequently Asked and Questions 5.1 Light fault’ classifications and alarm

The occurrences of following faults are treated as light fault: the power unit bypass operation faults, slight overheat in transformer, linkage fault of the cabinet door, fault of the electrical motor’s cabinet fan, slight overheat of the electrical motor, the UPS inputs power-off, Industrial Control PC fault (standard operation panel will not be out of work with such fault).

During the occurrences of anyone of the faults above, the system releases an intermittent “audible alarm” and an intermittent “fault indication” on screen. If the user presses the “alarm cancellation” key while the system in alarm-mode, the Industrial Control PC will eliminate the audible alarm. However, the “fault indication” will still remain on screen.

The system does not keep records of the occurrences of light fault in its memory. If such faults disappear automatically during the system alarms, the alarm would be canceled automatically. The light faults occurred during inverter operation will not cause the inverter to shutdown. If light fault occurred during the stop-mode, user can also start the inverter and other operations.


90

5.2 Serious faults’ classifications and corresponding alarm The occurrences of the following faults are treated as serious faults: Serious faults of the

power units, Serious transformers overheat, mechanical field fault, Serious electrical motor overheat, reference value and feedback line-off fault in closed loop status.

During the occurrences of anyone of the faults above, the system release continuous " audible alarm", as well as warnings such as " fault indication”," emergency high voltage cutoff", and " emergency stop". If the user presses the “alarm solution” key while the system in alarm-mode, the Industrial Control PC will eliminate the audible alarm. However, the “fault indication”, “emergency high voltage cutoff” and “emergency stop” will still remain on screen.

The system automatically records the occurrences of serious faults into its memory. During serious faults, the system will automatically shutdown. If such faults disappear automatically during the system alarms, "fault indication" " emergency high voltage cutoff "," emergency stop" warnings will remain on screen and the fault record will record the cause reason of fault. Only when faults are completely eliminated, user can use the “system reset mode” key to reset the inverter.

When serious faults occur, the high voltage power supply will be disconnected automatically. If the high voltage power is not cut for any reason, user can use the “emergency stop" key on the cabinet door to cut the high voltage power supply immediately.


91

5.3 Dispositions of FAQ The high-voltage inverter system is highly intelligent with reliable fault-detecting circuits. It

can accurately detect the exact fault position, and clearly indicate the results on the standard operation panel of the Industrial Control PC. User can take the corresponding actions according to the indicated fault information. 5.3.1 Power unit over-voltage

Please check whether the positive fluctuation of input high voltage power exceeds the accepted value; if over-voltage occurs during deceleration, please appropriately lengthen the deceleration time of the inverter.

Exclude situations with the existence of additional user agreements, the positive fluctuation of the inverter’s input voltage has the maximum value of +5%. 5.3.2 Power unit low-voltage

Please check whether the negative fluctuation of input high voltage power exceeds accepted value, the power switch brake-off, secondary side of the transformer is short-circuit, and the connection bolt is tight. Please also check whether three input line of power unit is loose and the fuse of three input line of power unit is intact.

Exclude situations with the existence of additional user agreements, the negative fluctuation of the inverter’s input voltage has the maximum value of -5%. 5.3.3 Power unit over-current

Please check whether the power unit output UV terminal short, the electrical motor insulation well, and equipments over-load, or mechanical faults exist. If over-current occurs in acceleration, please appropriately length the acceleration time of the inverter. 5.3.4 Power unit overheat

Please check whether environmental temperature exceeds accepted value, power unit cabinet fan in normal working, air entry and export unimpeded, and equipment consistently overload. Check whether the power unit temperature relay normal.

If the inverter often works in environments with excessive amount of dust, therefore, user is recommended to routinely clean up the cabinet dust shield to ensure the performance of inverter. If the environmental temperature exceeds the accepted value, user is recommended to install air conditioners and ventilation equipments. 5.3.5 Power unit phase-lack

Please check whether the power switch brake-off, secondary side of the transformer is short, and the connection bolt is tightly fastened. Also check whether the three input line of power unit is loose and the fuse of three input line of power unit is intact. 5.3.6 Power unit fiber communication fault

Please check whether the power unit’s control power is normal (when normal, the green indicating lamp in L1 lights), and the fiber terminal by which the fiber connects the power unit and the controller deciduous. Please also check whether the fiber is broken.


92

5.3.7 controllers not ready When the controller fails to pass the self-inspection, the system will indicate such a fault.

User can try to re-set the inverters’ parameters, and then reset the inverter. If the self-inspection still fails, please check the reliability of the conjunction of the circuit board, or replace the single chip processor control board. 5.3.8 Bypass operation alarm

When individual power unit syndromes, this inverter system can bypass the power unit and work under a lower frequency without inverter stop. Then the inverter will release the bypass operation alarm. In bypass mode, the inverter cannot work in full capacity for long time. 5.3.9 Cabinet’s interlock alarm

The inverter will report cabinet’s interlock alarm when anyone of the transformer cabinet doors, power unit cabinet doors or control cabinet doors is open. Please check whether the cabinet doors are closed tightly, trip switch intact, and whether the wire is deciduous. 5.3.10 Power unit cabinet fan fault

The power unit cabinet fan fault refers to the fault of power unit cabinets’ cooling fan. Please check power supply and switches of the fan and startup capacity, blast relay and blast pipe, etc. 5.3.11 Transformer slight overheat

It is indicated by the closure of the rectifying transformer’s overheat node. Please check whether the insulation of the transformer’s secondary side is intact or short, equipment is over-load, and the ambient temperature is too high. Please also check whether the cooling fan of the transformer is working normally, the wind path is unstuffy, and the temperature controller function is intact. Please check also whether the parameter of the temperature controller is reasonably set, and the parameter have been illegally reset or modified. The system default transformer overheat protection temperature is 120 .℃

The temperature controller overheat alarm parameter should be set and inspected in following steps:

l Press SET，the PV displays -cd- ，use Δ or ▽to set SV value as 1005; (the parameter

set-up password)

l Press SET，the PV displays -ob-，useΔ or ▽to set SV value as 80.0（the target

temperature of fan starting）；

l Press SET，the PV displays -df-，useΔ or ▽to set SV value as 5.0 : When temperature

is higher than 80+5=85 s start the fan, when temperature is lower than 80℃ -5=75 stop ℃

the fan.

l Press SET，the PV displays -AH-，useΔ or ▽to set SV value as 130.0（over temperature


93

protection value）；

l Press SET，the PV displays -AL-，useΔ or ▽to set SV value as 120.0（over temperature

alarm value）；

l Press SET，confirm the modified parameters.

5.3.12 Field alarm input valid

The input alarm node reserved for the field closes. If user receives the outside alarm signal on the node, please check the signal and its corresponding alarm equipments.

5.3.13 Transformer serious overheat Rectifying transformer’s serious overheat node is closes. Please check whether the

transformer insulation of the secondary side is intact or short, equipment is over-load, and ambient temperature is too high. Please also check whether the cooling fan of the transformer is in normal working, wind path is unstuffy, and temperature controller function is intact. Please check whether overheat alarm parameter of temperature controller is reasonably set and parameter have been illegally reset or modified. The system default transformer overheat protection temperature is 130

.℃ The inspection and set-up of the temperature controller overheat protection parameter refers

to 5.3.11.

5.3.12 Field brake-sever input valid The reserved Field brake-sever input node is close. If the user receives signals on such node,

please check the signal and the corresponding alarm equipments.

5.3.13 The power off alarm of the UPS input If the UPS input is power off, it generally refers to the occurrence of the control power

supply fault. System will work continuously with the support of UPS battery. User should find out the cause of the power supply cut-off as quickly as possible and recover power supply. 5.3.14 No audible alarm when fault occurs

Once user presses "alarm solution" key, the system will continue work under existing fault without audible alarm, only fault onscreen indications. In the stop-mode, user can use the “system reset" command to reset the inverter system, and recover the audible alarm function of the system. 5.3.15 Alarm without interface indications

When control system has powered on and PLC is in normal working, the abnormal working of the industrial computer or standard operation panel will also cause alarm. User is recommended to inspect the industrial computer power cable, whether the industrial computer’s power switch is switched on, and the entry of the industrial computer interface. Please also check whether the controller is in normal working.

If the inverter is configured with a standard operation panel, user should verify whether the


94

power cable of operation panel is working normally. 5.3.16 The PLC has no response

If the industrial computer fails to establish communication with the PLC, user is recommended to check the communication cable, which connects the industrial computer and the PLC. User needs to confirm the PLC is set in the position of RUN, check whether PLC is intact, and verify whether industrial computer’s Standard-485 card is well.

If the inverter is configured as the standard operation panel and the standard operation panel fails to establish communication with the PLC, user is recommended to check the communication cable and connector between standard operation panel and PLC, confirm the PLC is set in the position of RUN, and verify whether PLC is intact. 5.3.17 disposition after the down fault of standard operation panel and industrial computers

When standard operation panel is down, the inner watchdog of standard operation panel will automatically reset and cause alarm at the same time. If the watchdog is also out of working, then user needs to reset the standard operation panel manually with the “clear screen” key. If the standard operation panel recovers its monitor function after reset, the alarm will be canceled simultaneously.

During the working of the high-voltage inverter system, the down fault of the standard operation panel will not affect the high-voltage inverter system’s operation. However, the standard operation panel will lose its monitor function. Under “local control” mode, start, shut down, the frequency-set functions are ineffective. If the standard operation panel cannot recover from the fault, user can switch the inverter to the “remote control” mode and use the remote commands to control the inverter.

When the industrial computer is down, the control system will automatically reset and cancel the alarm. If the controller recovers its monitor function after reset, the alarm will automatically be canceled.

If the industrial computer is down during inverter operation, it will not affect the inverter operation in its original status. However, the industrial computer will lose its monitor function. Under “local control” mode, start, shut down, the frequency-set functions are ineffective. If the industrial computer cannot recover from the fault, user can switch the inverter to the “remote control” mode use the remote commands to control the inverter.

5.3.18 Inverter start fault

The high-voltage inverter system can only be started after the system receives “system ready” signal. When controller is ready, machine start permitted, remote control, and "emergency stop" buttons of cabinet door released, and system not experiencing any serious faults, the system will send out a "high-voltage switching on permission” signal. After they system receives “high voltage ready” signal, it will go to “system ready” mode. User is recommended to check all the prerequisites above when the inverter fails to start without any fault reported.

If the inverter can’t be started in “remote control” mode, user is recommended to check the "remote /local control" switch to ensure it is in the “remote control” mode. If the controller or the standard operation panel interface fails to start, user is recommended to check the "remote/local control" switch to ensure it is in “local control” mode.


95

5.3.19 the operation frequency can’t be modified

The operation frequency set mode of high-voltage inverter system is set by the industrial computer interface independently, without any relation by the inverter’s control mode. If user can’t modify the inverter’s operation frequency with the external analogue potentiometer, the fault reason may be that the frequency set mode of the controller or the standard operation panel is set as “computer set mode”. If the industrial computer interface fails to set the operation frequency, the fault reason may be that the set mode of industrial computer interface is set as “analogue set mode”. If the function set mode of the inverter in industrial computer interface is set as closed loop mode, then the PID modulator, not user, will provide inverter operation frequency. User can only set the controlled desire value by external analogue potentiometer or the industrial computer interface.

If the inverter output frequency is below the set value, the reason may be that the user-set frequency exceeds the range of maximum and minimum limits, or the set frequency is within the range of jump-frequency. If the system automatically shut down after reaching a high frequency value every time, the reason may be that the inverter has being set a soft-start mode.

If the high-voltage inverter system is configured with the standard operation panel, all situations are the same as above.


96

5.4 How to replace a faulty power unit All power units are completely identical. When anyone of the power units is faulty, it can be

replaced after the inverter system stop down. Please follow the following steps to replace the power unit: Step 1: Use “stop” or “emergency stop” command to stop the inverter. Step 2: Disconnect the inverter from high voltage power source. Step 3: Open the power unit cabinet, wait till all the indicating lights L1 and L2 extinguish. Step 4: Take the two power unit fiber heads--J1 and J2 off the faulty power unit. Step 5: Discharge R, S, T, U, and V lines of the faulty power unit with a wrench. Step 6: Dismantle bolts between the faulty power unit and orbital. Step 7: Pull out the power unit along the orbit, and please be very carefully. Step 8: Install the spare power unit in the reverse steps described above. Step 9: Repeat all the steps to put the inverter to power supply and operate it. Step 10: Contact with the supplier for reparation.


97

Chap 6 Transport and Storage 6.1 Transport and storage 6.1.1 Transport

The product can be transported by a variety of vehicles such as cars, trains, airplanes, ships, etc. It must be handled with care and strictly kept from rain or excessive exposure to sunlight. It is also imperative to avoid violent turbulence and impact during transportation. And the product should be placed in the upright position at all times.

The inverter has the height reaches to 2500 mm, and 2900 mms after packaging. We recommend our clients to consider the height requirements in appropriate vehicles during the transportation process. 6.1.2 storage

The product should be protected from rain and excessive exposure to sunlight. It should be placed in storage areas with adequate air circulation, and environment temperature should be within the range of –25~ +55 . The air temperature should be ℃ 20±5℃. No corrosive air is allowed exists.

precautions and warnings - abcenser.com.tr · n harsvert-a series variable frequency drive is lived...

Documents